Physics 126 Practice Exam #4 Professor Siegel

Size: px
Start display at page:

Download "Physics 126 Practice Exam #4 Professor Siegel"

Transcription

1 Physics 126 Practice Exam #4 Professor Siegel Name: Lab Day: 1. Light is usually thought of as wave-like in nature and electrons as particle-like. In which one of the following instances does light behave as a particle or does an electron behave as a wave? A) A Young's double slit experiment is conducted using blue light. B) X-rays are used to examine the crystal structure of sodium chloride. C) Water is heated to 99.0 o C in a microwave oven. D) An electron enters a parallel plate capacitor, which deflects the electron downward. E) A beam of electrons is diffracted as it passes through a narrow slit. 2. Upon which one of the following parameters does the energy of a photon depend? A) mass B) amplitude C) polarization D) frequency E) phase relationships 3. Determine the energy of a single photon in a monochromatic beam of light of wavelength 625 nm. A) 1.99 ev B) 2.08 ev C) 2.32 ev D) 3.49 ev E) 4.77 ev 4. A laser emits a single, 3.0-ms pulse of light that has a frequency of Hz and a total power of W. How many photons are in the pulse? A) B) C) D) E) Page 1

2 5. Which one of the following phrases best describes the term work function? A) the minimum energy required to vaporize a metal surface B) the work required to place a charged particle on a metal surface C) the minimum energy required to remove electrons from a metal surface D) the minimum energy required to remove an atom from a metal surface E) the work done by electromagnetic radiation when it hits a metal surface Use the following to answer questions 6-7: A physicist wishes to produce electrons by shining light on a metal surface. The light source emits light with a wavelength of 450 nm. The table lists the only available metals and their work functions. Metal barium lithium tantalum tungsten W0 (ev) Which metal(s) can be used to produce electrons by the photoelectric effect? A) barium only B) tungsten only C) tungsten or tantalum D) barium or lithium E) lithium, tantalum, or tungsten 7. Which entry in the table below correctly identifies the metal that will produce the most energetic electrons and their energies? A) B) Metal lithium lithium Maximum electron energy observed 2.3 ev 0.5 ev C) D) tungsten tungsten 1.8 ev 2.8 ev E) tungsten 4.5 ev Page 2

3 8. In the Compton scattering experiment shown in the figure, a monochromatic beam of X- rays strikes a target containing free electrons. Scattered X-rays are detected with a wavelength of m at an angle of 45 away from the original beam direction. What is the wavelength of the incident monochromatic X-rays? Note: The mass of an electron is kg. A) m B) m C) m D) m E) m 9. Determine the de Broglie wavelength of a neutron (m = kg) that has a speed of 5.0 m/s. A) 79 nm B) 162 nm C) 395 nm D) 529 nm E) 1980 nm 10. The position of a hydrogen atom (m = kg) is known to within m. What is the minimum uncertainty in the atom's velocity? A) zero m/s B) m/s C) m/s D) m/s E) m/s Page 3

4 11. Each atom in the periodic table has a unique set of spectral lines. The model of atomic structure that provides the best explanation for this observation was proposed by A) Balmer. B) Bohr. C) Einstein. D) Rutherford. E) Thomson. 12. Why was it necessary for Bohr to require that electrons remain in stationary orbits? A) An electron must travel in a circular path. B) It was required by the Heisenberg uncertainty principle. C) No two electrons can be in the same region in the atom. D) It was required by the Pauli exclusion principle. E) Classical physics predicts that the electron should spiral into the nucleus. 13. Electrons have been removed from a lithium atom (Z = 3) until only one remains. Determine the energy of the photon that can be emitted if the remaining electron is in the n = 2 level. A) 33.7 ev B) 54.4 ev C) 91.9 ev D) 163 ev E) 181 ev 14. Which one of the following will result in an electron transition from the n = 4 level to the n = 7 level in a hydrogen atom? A) emission of a 0.28 ev photon B) emission of a 0.57 ev photon C) absorption of a 0.85 ev photon D) absorption of a 0.28 ev photon E) absorption of a 0.57 ev photon 15. Determine the energy of the photon emitted when the electron in a hydrogen atom undergoes a transition from the n = 7 level to the n = 4 level. A) 0.17 ev B) 0.21 ev C) 0.36 ev D) 0.57 ev E) 1.3 ev Page 4

5 16. According to the Bohr model, what is the radius of a hydrogen atom when its electron is excited to the n = 9 state? A) m B) m C) m D) m E) m 17. The electron in a hydrogen atom is in the n = 3 state. What is(are) the possible value(s) for an emitted photon? A) 1.89 ev or ev B) 1.89 ev or 13.6 ev C) 0.66 ev or 13.6 ev D) 0.66 ev or ev E) 1.51 ev only 18. How many neutrons are there in the nucleus ? A) 79 B) 55 C) 134 D) 24 E) Which one of the following pairs of symbols represents two isotopes? A) O, 7N B) C, 6C C) O, 11Na D) N, 6C E) N, 6C Page 5

6 20. Osmium has atomic number 76. A particular isotope of osmium has an atomic mass of u. Which symbol correctly represents this isotope? A) B) C) D) E) 192 Os Os 76 Os Os 111 Os What is the approximate radius of a nitrogen nucleus that has seven protons and seven neutrons? A) m B) m C) m D) m E) m 22. What is the binding energy per nucleon of Hg that has an atomic mass of u? Note: Use the following atomic masses in your calculation: 1 H 1 = u and 1 0 = u. A) MeV B) MeV C) MeV D) MeV E) MeV 23. Which particle(s) is(are) emitted when decays into 40 20? A) a photon B) a proton C) an alpha particle D) a positron and a neutrino E) an electron and an antineutrino Page 6

7 24. Which one of the following isotopes is produced when 145 Pm 61 decays by emitting an α particle? A) B) C) D) E) La Pr Nd Pm Sm 25. An isotope of krypton has a half-life of 3 minutes. A sample of this isotope produces 1000 counts per minute in a Geiger counter. Determine the number of counts per minute produced after 15 minutes. A) zero B) 15 C) 30 D) 60 E) 1000 Page 7

8 Answer Key 1. E 2. D 3. A 4. B 5. C 6. D 7. B 8. E 9. A 10. D 11. B 12. E 13. C 14. E 15. D 16. D 17. A 18. A 19. B 20. D 21. D 22. D 23. E 24. B 25. C Page 8

Exam 4. P202 Spring 2004 Instructor: Prof. Sinova

Exam 4. P202 Spring 2004 Instructor: Prof. Sinova Exam 4 P202 Spring 2004 Instructor: Prof. Sinova Name: Date: 4/22/04 Section: All work must be shown to get credit for the answer marked. You must show or state your reasoning. If the answer marked does

More information

THE NATURE OF THE ATOM. alpha particle source

THE NATURE OF THE ATOM. alpha particle source chapter THE NATURE OF THE ATOM www.tutor-homework.com (for tutoring, homework help, or help with online classes) Section 30.1 Rutherford Scattering and the Nuclear Atom 1. Which model of atomic structure

More information

SECTION A Quantum Physics and Atom Models

SECTION A Quantum Physics and Atom Models AP Physics Multiple Choice Practice Modern Physics SECTION A Quantum Physics and Atom Models 1. Light of a single frequency falls on a photoelectric material but no electrons are emitted. Electrons may

More information

U n 3 n Ba Kr (D) Br (C) Kr (B) Rb (E) 94 37

U n 3 n Ba Kr (D) Br (C) Kr (B) Rb (E) 94 37 1984 36. The critical angle for a transparent material in air is 30. The index of refraction of the material is most nearly (A) 0.33 (B) 0.50 (C) 1.0 (D) 1.5 (E) 2.0 37. An object is placed as shown in

More information

Energy levels and atomic structures lectures chapter one

Energy levels and atomic structures lectures chapter one Structure of Atom An atom is the smallest constituent unit of ordinary matter that has the properties of a element. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Atoms are

More information

Chapter 27 Early Quantum Theory and Models of the Atom Discovery and Properties of the electron

Chapter 27 Early Quantum Theory and Models of the Atom Discovery and Properties of the electron Chapter 27 Early Quantum Theory and Models of the Atom 27-1 Discovery and Properties of the electron Measure charge to mass ratio e/m (J. J. Thomson, 1897) When apply magnetic field only, the rays are

More information

Planck s Quantum Hypothesis Blackbody Radiation

Planck s Quantum Hypothesis Blackbody Radiation Planck s Quantum Hypothesis Blackbody Radiation The spectrum of blackbody radiation has been measured(next slide); it is found that the frequency of peak intensity increases linearly with temperature.

More information

Chemistry (

Chemistry ( Question 2.1: (i) Calculate the number of electrons which will together weigh one gram. (ii) Calculate the mass and charge of one mole of electrons. Answer 2.1: (i) Mass of one electron = 9.10939 10 31

More information

2. Determine the excess charge on the outer surface of the outer sphere (a distance c from the center of the system).

2. Determine the excess charge on the outer surface of the outer sphere (a distance c from the center of the system). Use the following to answer question 1. Two point charges, A and B, lie along a line separated by a distance L. The point x is the midpoint of their separation. 1. Which combination of charges will yield

More information

Chapter 4 The Structure of the Atom

Chapter 4 The Structure of the Atom Chapter 4 The Structure of the Atom Read pg. 86-97 4.1 Early Theories of Matter The Philosophers Democritus Artistotle - Artistotle s influence so great and the science so primitive (lacking!) his denial

More information

Physics 3204 UNIT 3 Test Matter Energy Interface

Physics 3204 UNIT 3 Test Matter Energy Interface Physics 3204 UNIT 3 Test Matter Energy Interface 2005 2006 Time: 60 minutes Total Value: 33 Marks Formulae and Constants v = f λ E = hf h f = E k + W 0 E = m c 2 p = h λ 1 A= A T 0 2 t 1 2 E k = ½ mv 2

More information

Preview. Atomic Physics Section 1. Section 1 Quantization of Energy. Section 2 Models of the Atom. Section 3 Quantum Mechanics

Preview. Atomic Physics Section 1. Section 1 Quantization of Energy. Section 2 Models of the Atom. Section 3 Quantum Mechanics Atomic Physics Section 1 Preview Section 1 Quantization of Energy Section 2 Models of the Atom Section 3 Quantum Mechanics Atomic Physics Section 1 TEKS The student is expected to: 8A describe the photoelectric

More information

Rb, which had been compressed to a density of 1013

Rb, which had been compressed to a density of 1013 Modern Physics Study Questions for the Spring 2018 Departmental Exam December 3, 2017 1. An electron is initially at rest in a uniform electric field E in the negative y direction and a uniform magnetic

More information

The Photoelectric Effect

The Photoelectric Effect The Photoelectric Effect Light can strike the surface of some metals causing an electron to be ejected No matter how brightly the light shines, electrons are ejected only if the light has sufficient energy

More information

WAVE NATURE OF LIGHT

WAVE NATURE OF LIGHT WAVE NATURE OF LIGHT Light is electromagnetic radiation, a type of energy composed of oscillating electric and magnetic fields. The fields oscillate perpendicular to each other. In vacuum, these waves

More information

A) n L < 1.0 B) n L > 1.1 C) n L > 1.3 D) n L < 1.1 E) n L < 1.3

A) n L < 1.0 B) n L > 1.1 C) n L > 1.3 D) n L < 1.1 E) n L < 1.3 1. A beam of light passes from air into water. Which is necessarily true? A) The frequency is unchanged and the wavelength increases. B) The frequency is unchanged and the wavelength decreases. C) The

More information

Name Date Class MODELS OF THE ATOM

Name Date Class MODELS OF THE ATOM 5.1 MODELS OF THE ATOM Section Review Objectives Identify inadequacies in the Rutherford atomic model Identify the new assumption in the Bohr model of the atom Describe the energies and positions of electrons

More information

CHAPTER 12 TEST REVIEW

CHAPTER 12 TEST REVIEW IB PHYSICS Name: Period: Date: # Marks: 76 Raw Score: IB Curve: DEVIL PHYSICS BADDEST CLASS ON CAMPUS CHAPTER 12 TEST REVIEW 1. An alpha particle is accelerated through a potential difference of 10 kv.

More information

Topic 7 &13 Review Atomic, Nuclear, and Quantum Physics

Topic 7 &13 Review Atomic, Nuclear, and Quantum Physics Name: Date:. Isotopes provide evidence for the existence of A. protons. B. electrons. C. nuclei. Topic 7 &3 Review Atomic, Nuclear, and Quantum Physics D. neutrons.. The atomic line spectra of elements

More information

Particle nature of light & Quantization

Particle nature of light & Quantization Particle nature of light & Quantization A quantity is quantized if its possible values are limited to a discrete set. An example from classical physics is the allowed frequencies of standing waves on a

More information

Chemistry. Slide 1 / 72. Slide 2 / 72. Slide 3 / 72. Atomic Structures Practice Problems

Chemistry. Slide 1 / 72. Slide 2 / 72. Slide 3 / 72. Atomic Structures Practice Problems Slide 1 / 72 Slide 2 / 72 Chemistry Atomic Structures Practice Problems 2015-10-27 www.njctl.org 1 According to Einstein s view of matter and energy, what is the common link between light and matter? Slide

More information

DUAL NATURE OF RADIATION AND MATTER

DUAL NATURE OF RADIATION AND MATTER Chapter Eleven DUAL NATURE OF RADIATION AND MATTER MCQ I 111 A particle is dropped from a height H The de Broglie wavelength of the particle as a function of height is proportional to (a) H (b) H 1/2 (c)

More information

Stellar Astrophysics: The Interaction of Light and Matter

Stellar Astrophysics: The Interaction of Light and Matter Stellar Astrophysics: The Interaction of Light and Matter The Photoelectric Effect Methods of electron emission Thermionic emission: Application of heat allows electrons to gain enough energy to escape

More information

Questions Q1. * Rutherford designed an experiment to see what happened when alpha particles were directed at a piece of gold foil. Summarise the observations and state the conclusions Rutherford reached

More information

Quantum Physics and Atomic Models Chapter Questions. 1. How was it determined that cathode rays possessed a negative charge?

Quantum Physics and Atomic Models Chapter Questions. 1. How was it determined that cathode rays possessed a negative charge? Quantum Physics and Atomic Models Chapter Questions 1. How was it determined that cathode rays possessed a negative charge? 2. J. J. Thomson found that cathode rays were really particles, which were subsequently

More information

PHYSICS 3204 PUBLIC EXAM QUESTIONS (Quantum pt.1)

PHYSICS 3204 PUBLIC EXAM QUESTIONS (Quantum pt.1) PHYSICS 3204 PUBLIC EXAM QUESTIONS (Quantum pt.1) NAME: August 2009--------------------------------------------------------------------------------------------------------------------------------- 11 41.

More information

WAVES AND PARTICLES. (c)

WAVES AND PARTICLES. (c) WAVES AND PARTICLES 1. An electron and a proton are accelerated through the same potential difference. The ration of their De Broglie wave length will be -- (a) (b) (c) (d) 1 2. What potential must be

More information

Chapter 37 Early Quantum Theory and Models of the Atom

Chapter 37 Early Quantum Theory and Models of the Atom Chapter 37 Early Quantum Theory and Models of the Atom Units of Chapter 37 37-7 Wave Nature of Matter 37-8 Electron Microscopes 37-9 Early Models of the Atom 37-10 Atomic Spectra: Key to the Structure

More information

I. Multiple Choice Questions (Type-I)

I. Multiple Choice Questions (Type-I) I. Multiple Choice Questions (Type-I) 1. Which of the following conclusions could not be derived from Rutherford s α -particle scattering experiement? (i) Most of the space in the atom is empty. (ii) The

More information

Chapter 7 Atomic Structure -1 Quantum Model of Atom. Dr. Sapna Gupta

Chapter 7 Atomic Structure -1 Quantum Model of Atom. Dr. Sapna Gupta Chapter 7 Atomic Structure -1 Quantum Model of Atom Dr. Sapna Gupta The Electromagnetic Spectrum The electromagnetic spectrum includes many different types of radiation which travel in waves. Visible light

More information

CHEMISTRY Matter and Change

CHEMISTRY Matter and Change CHEMISTRY Matter and Change Chapter 5: Electrons in Atoms 5 Section 5.1 Section Section 5.3 Table Of Contents Light and Quantized Energy Electron Configuration Compare the wave and particle natures of

More information

Exam 2 Development of Quantum Mechanics

Exam 2 Development of Quantum Mechanics PHYS40 (Spring 00) Riq Parra Exam # (Friday, April 1 th, 00) Exam Development of Quantum Mechanics Do NOT write your name on this exam. Write your class ID number on the top right hand corner of each problem

More information

ATOMIC STRUCTURE, ELECTRONS, AND PERIODICITY

ATOMIC STRUCTURE, ELECTRONS, AND PERIODICITY ATOMIC STRUCTURE, ELECTRONS, AND PERIODICITY All matter is made of atoms. There are a limited number of types of atoms; these are the elements. (EU 1.A) Development of Atomic Theory Atoms are so small

More information

Discovery of the Atomic Nucleus. Conceptual Physics 11 th Edition. Discovery of the Electron. Discovery of the Atomic Nucleus

Discovery of the Atomic Nucleus. Conceptual Physics 11 th Edition. Discovery of the Electron. Discovery of the Atomic Nucleus Conceptual Physics 11 th Edition Chapter 32: THE ATOM AND THE QUANTUM Discovery of the Atomic Nucleus These alpha particles must have hit something relatively massive but what? Rutherford reasoned that

More information

UGC ACADEMY LEADING INSTITUE FOR CSIR-JRF/NET, GATE & JAM PHYSICAL SCIENCE TEST SERIES # 4. Atomic, Solid State & Nuclear + Particle

UGC ACADEMY LEADING INSTITUE FOR CSIR-JRF/NET, GATE & JAM PHYSICAL SCIENCE TEST SERIES # 4. Atomic, Solid State & Nuclear + Particle UGC ACADEMY LEADING INSTITUE FOR CSIR-JRF/NET, GATE & JAM BOOKLET CODE PH PHYSICAL SCIENCE TEST SERIES # 4 Atomic, Solid State & Nuclear + Particle SUBJECT CODE 05 Timing: 3: H M.M: 200 Instructions 1.

More information

1 The Cathode Rays experiment is associated. with: Millikan A B. Thomson. Townsend. Plank Compton

1 The Cathode Rays experiment is associated. with: Millikan A B. Thomson. Townsend. Plank Compton 1 The Cathode Rays experiment is associated with: A B C D E Millikan Thomson Townsend Plank Compton 1 2 The electron charge was measured the first time in: A B C D E Cathode ray experiment Photoelectric

More information

= : K A

= : K A Atoms and Nuclei. State two limitations of JJ Thomson s model of atom. 2. Write the SI unit for activity of a radioactive substance. 3. What observations led JJ Thomson to conclusion that all atoms have

More information

Chapter 37 Early Quantum Theory and Models of the Atom. Copyright 2009 Pearson Education, Inc.

Chapter 37 Early Quantum Theory and Models of the Atom. Copyright 2009 Pearson Education, Inc. Chapter 37 Early Quantum Theory and Models of the Atom Planck s Quantum Hypothesis; Blackbody Radiation Photon Theory of Light and the Photoelectric Effect Energy, Mass, and Momentum of a Photon Compton

More information

Chapter 28. Atomic Physics

Chapter 28. Atomic Physics Chapter 28 Atomic Physics Sir Joseph John Thomson J. J. Thomson 1856-1940 Discovered the electron Did extensive work with cathode ray deflections 1906 Nobel Prize for discovery of electron Early Models

More information

LECTURE 23 SPECTROSCOPY AND ATOMIC MODELS. Instructor: Kazumi Tolich

LECTURE 23 SPECTROSCOPY AND ATOMIC MODELS. Instructor: Kazumi Tolich LECTURE 23 SPECTROSCOPY AND ATOMIC MODELS Instructor: Kazumi Tolich Lecture 23 2 29.1 Spectroscopy 29.2 Atoms The first nuclear physics experiment Using the nuclear model 29.3 Bohr s model of atomic quantization

More information

Physics 6C. Final Practice Solutions. Prepared by Vince Zaccone For Campus Learning Assistance Services at UCSB

Physics 6C. Final Practice Solutions. Prepared by Vince Zaccone For Campus Learning Assistance Services at UCSB Physics 6C Final Practice Solutions Use the following information for problems 1 and. A beam of white light with frequency between 4.00 x 10 14 Hz and 7.90 x 10 14 Hz is incident on a sodium surface, which

More information

Physics 107 Final Exam May 6, Your Name: 1. Questions

Physics 107 Final Exam May 6, Your Name: 1. Questions Physics 107 Final Exam May 6, 1996 Your Name: 1. Questions 1. 9. 17. 5.. 10. 18. 6. 3. 11. 19. 7. 4. 1. 0. 8. 5. 13. 1. 9. 6. 14.. 30. 7. 15. 3. 8. 16. 4.. Problems 1. 4. 7. 10. 13.. 5. 8. 11. 14. 3. 6.

More information

Quantum and Atomic Physics - Multiple Choice

Quantum and Atomic Physics - Multiple Choice PSI AP Physics 2 Name 1. The Cathode Ray Tube experiment is associated with: (A) J. J. Thomson (B) J. S. Townsend (C) M. Plank (D) A. H. Compton 2. The electron charge was measured the first time in: (A)

More information

CHAPTER 7 TEST REVIEW

CHAPTER 7 TEST REVIEW IB PHYSICS Name: Period: Date: # Marks: 94 Raw Score: IB Curve: DEVIL PHYSICS BADDEST CLASS ON CAMPUS CHAPTER 7 TEST REVIEW 1. An alpha particle is accelerated through a potential difference of 10 kv.

More information

MIDTERM 3 REVIEW SESSION. Dr. Flera Rizatdinova

MIDTERM 3 REVIEW SESSION. Dr. Flera Rizatdinova MIDTERM 3 REVIEW SESSION Dr. Flera Rizatdinova Summary of Chapter 23 Index of refraction: Angle of reflection equals angle of incidence Plane mirror: image is virtual, upright, and the same size as the

More information

PSI AP Physics How was it determined that cathode rays possessed a negative charge?

PSI AP Physics How was it determined that cathode rays possessed a negative charge? PSI AP Physics 2 Name Chapter Questions 1. How was it determined that cathode rays possessed a negative charge? 2. J. J. Thomson found that cathode rays were really particles, which were subsequently named

More information

Physics 6C. Final Practice Solutions. Prepared by Vince Zaccone For Campus Learning Assistance Services at UCSB

Physics 6C. Final Practice Solutions. Prepared by Vince Zaccone For Campus Learning Assistance Services at UCSB Physics 6C Final Practice Solutions Use the following information for problems 1 and. A beam of white light with frequency between 4.00 x 10 14 Hz and 7.90 x 10 14 Hz is incident on a sodium surface, which

More information

Physics 1C Lecture 29B

Physics 1C Lecture 29B Physics 1C Lecture 29B Emission Spectra! The easiest gas to analyze is hydrogen gas.! Four prominent visible lines were observed, as well as several ultraviolet lines.! In 1885, Johann Balmer, found a

More information

Chapter 7. The Quantum Mechanical Model of the Atom

Chapter 7. The Quantum Mechanical Model of the Atom Chapter 7 The Quantum Mechanical Model of the Atom The Nature of Light:Its Wave Nature Light is a form of electromagnetic radiation composed of perpendicular oscillating waves, one for the electric field

More information

Electrons in Atoms. Section 5.1 Light and Quantized Energy Section 5.2 Quantum Theory and the Atom Section 5.3 Electron Configuration

Electrons in Atoms. Section 5.1 Light and Quantized Energy Section 5.2 Quantum Theory and the Atom Section 5.3 Electron Configuration Electrons in Atoms Section 5.1 Light and Quantized Energy Section 5.2 Quantum Theory and the Atom Section 5.3 Electron Configuration Click a hyperlink or folder tab to view the corresponding slides. Exit

More information

The Photoelectric Effect

The Photoelectric Effect Stellar Astrophysics: The Interaction of Light and Matter The Photoelectric Effect Methods of electron emission Thermionic emission: Application of heat allows electrons to gain enough energy to escape

More information

Chapter 6 - Electronic Structure of Atoms

Chapter 6 - Electronic Structure of Atoms Chapter 6 - Electronic Structure of Atoms 6.1 The Wave Nature of Light To understand the electronic structure of atoms, one must understand the nature of electromagnetic radiation Visible light is an example

More information

Chapter 5 Electrons In Atoms

Chapter 5 Electrons In Atoms Chapter 5 Electrons In Atoms 5.1 Revising the Atomic Model 5.2 Electron Arrangement in Atoms 5.3 Atomic Emission Spectra and the Quantum Mechanical Model 1 Copyright Pearson Education, Inc., or its affiliates.

More information

The wavefunction ψ for an electron confined to move within a box of linear size L = m, is a standing wave as shown.

The wavefunction ψ for an electron confined to move within a box of linear size L = m, is a standing wave as shown. 1. This question is about quantum aspects of the electron. The wavefunction ψ for an electron confined to move within a box of linear size L = 1.0 10 10 m, is a standing wave as shown. State what is meant

More information

Quantum Theory of the Atom

Quantum Theory of the Atom The Wave Nature of Light Quantum Theory of the Atom Electromagnetic radiation carries energy = radiant energy some forms are visible light, x rays, and radio waves Wavelength ( λ) is the distance between

More information

is the minimum stopping potential for which the current between the plates reduces to zero.

is the minimum stopping potential for which the current between the plates reduces to zero. Module 1 :Quantum Mechanics Chapter 2 : Introduction to Quantum ideas Introduction to Quantum ideas We will now consider some experiments and their implications, which introduce us to quantum ideas. The

More information

Lecture PowerPoints. Chapter 27 Physics: Principles with Applications, 7th edition Giancoli

Lecture PowerPoints. Chapter 27 Physics: Principles with Applications, 7th edition Giancoli Lecture PowerPoints Chapter 27 Physics: Principles with Applications, 7th edition Giancoli This work is protected by United States copyright laws and is provided solely for the use of instructors in teaching

More information

1 Electrons are emitted from a metal surface when it is illuminated with suitable electromagnetic radiation. ...[1]

1 Electrons are emitted from a metal surface when it is illuminated with suitable electromagnetic radiation. ...[1] 1 Electrons are emitted from a metal surface when it is illuminated with suitable electromagnetic radiation. 1 (a) (b) Name the effect described above....[1] The variation with frequency f of the maximum

More information

The Bohr Model of Hydrogen

The Bohr Model of Hydrogen The Bohr Model of Hydrogen Suppose you wanted to identify and measure the energy high energy photons. One way to do this is to make a calorimeter. The CMS experiment s electromagnetic calorimeter is made

More information

1. (a) An ion of plutonium Pu has an overall charge of C. (iii) electrons... (3) (2) (Total 5 marks)

1. (a) An ion of plutonium Pu has an overall charge of C. (iii) electrons... (3) (2) (Total 5 marks) AQA Questions from 2004 to 2006 Particle Physics 239 94 1. (a) An ion of plutonium Pu has an overall charge of +1.6 10 19 C. For this ion state the number of (i) protons... neutrons... (iii) electrons...

More information

Which of the following classes of electromagnetic waves will not ionise neutral atoms?

Which of the following classes of electromagnetic waves will not ionise neutral atoms? 1 In an experiment to demonstrate the photoelectric effect, a charged metal plate is illuminated with light from different sources. The plate loses its charge when an ultraviolet light source is used but

More information

Name Date Class MODELS OF THE ATOM

Name Date Class MODELS OF THE ATOM Name Date Class 5.1 MODELS OF THE ATOM Section Review Objectives Identify inadequacies in the Rutherford atomic model Identify the new assumption in the Bohr model of the atom Describe the energies and

More information

Atomic Structure Early Theories Democritus: 4 B.C.: atom Dalton: atoms cannot Thomson: Cathode Ray Tubes Rutherford:

Atomic Structure Early Theories Democritus: 4 B.C.: atom Dalton: atoms cannot Thomson: Cathode Ray Tubes Rutherford: Atomic Structure n a well-substantiated explanation of some aspect of the natural world; n an organized system of accepted knowledge that applies in a variety of circumstances to explain a specific set

More information

Lecture 11. > Uncertainty Principle. > Atomic Structure, Spectra

Lecture 11. > Uncertainty Principle. > Atomic Structure, Spectra Lecture 11 > Uncertainty Principle > Atomic Structure, Spectra *Beiser, Mahajan & Choudhury, Concepts of Modern Physics 7/e French, Special Relativity *Nolan, Fundamentals of Modern Physics 1/e Serway,

More information

Which of the following can be used to calculate the resistive force acting on the brick? D (Total for Question = 1 mark)

Which of the following can be used to calculate the resistive force acting on the brick? D (Total for Question = 1 mark) 1 A brick of mass 5.0 kg falls through water with an acceleration of 0.90 m s 2. Which of the following can be used to calculate the resistive force acting on the brick? A 5.0 (0.90 9.81) B 5.0 (0.90 +

More information

Atoms, Electrons and Light MS. MOORE CHEMISTRY

Atoms, Electrons and Light MS. MOORE CHEMISTRY Atoms, Electrons and Light MS. MOORE CHEMISTRY Atoms Remember Rutherford??? What did he discover with his gold foil experiment. A: Atoms contain a dense nucleus where the protons and neutrons reside. ATOMS

More information

CHAPTER 27 Quantum Physics

CHAPTER 27 Quantum Physics CHAPTER 27 Quantum Physics Units Discovery and Properties of the Electron Planck s Quantum Hypothesis; Blackbody Radiation Photon Theory of Light and the Photoelectric Effect Energy, Mass, and Momentum

More information

Chapter 7: The Quantum-Mechanical Model of the Atom

Chapter 7: The Quantum-Mechanical Model of the Atom C h e m i s t r y 1 A : C h a p t e r 7 P a g e 1 Chapter 7: The Quantum-Mechanical Model of the Atom Homework: Read Chapter 7. Work out sample/practice exercises Check for the MasteringChemistry.com assignment

More information

It s a wave. It s a particle It s an electron It s a photon. It s light!

It s a wave. It s a particle It s an electron It s a photon. It s light! It s a wave It s a particle It s an electron It s a photon It s light! What they expected Young s famous experiment using a beam of electrons instead of a light beam. And, what they saw Wave-Particle Duality

More information

Electrons in Atoms. Section 5.1 Light and Quantized Energy

Electrons in Atoms. Section 5.1 Light and Quantized Energy Name Date Class 5 Electrons in Atoms Section 5.1 Light and Quantized Energy In your textbook, read about the wave nature of light. Use each of the terms below just once to complete the passage. amplitude

More information

ATOMIC STRUCTURE, ELECTRONS, AND PERIODICITY

ATOMIC STRUCTURE, ELECTRONS, AND PERIODICITY ATOMIC STRUCTURE, ELECTRONS, AND PERIODICITY All matter is made of atoms. There are a limited number of types of atoms; these are the elements. (EU 1.A) Development of Atomic Theory Atoms are so small

More information

Physics 1302, Exam 4 Review

Physics 1302, Exam 4 Review c V Andersen, 2006 1 Physics 1302, Exam 4 Review The following is a list of things you should definitely know for the exam, however, the list is not exhaustive. You are responsible for all the material

More information

THE EDUCARE (SIROHI CLASSES) TEST SERIES 2018

THE EDUCARE (SIROHI CLASSES) TEST SERIES 2018 THE EDUCARE (SIROHI CLASSES) TEST SERIES 2018 XII PHYSICS TEST MODERN PHYSICS NAME-... DATE-.. MM- 25 TIME-1 HR 1) Write one equation representing nuclear fusion reaction. (1) 2) Arrange radioactive radiations

More information

The Atom. Result for Hydrogen. For example: the emission spectrum of Hydrogen: Screen. light. Hydrogen gas. Diffraction grating (or prism)

The Atom. Result for Hydrogen. For example: the emission spectrum of Hydrogen: Screen. light. Hydrogen gas. Diffraction grating (or prism) The Atom What was know about the atom in 1900? First, the existence of atoms was not universally accepted at this time, but for those who did think atoms existed, they knew: 1. Atoms are small, but they

More information

AP Physics Study Guide Modern Physics I. Atomic Physics and Quantum Effects 1. Who is generally credited with the discovery of the electron?

AP Physics Study Guide Modern Physics I. Atomic Physics and Quantum Effects 1. Who is generally credited with the discovery of the electron? AP Physics Study Guide Modern Physics I. Atomic Physics and Quantum Effects 1. Who is generally credited with the discovery of the electron? 2. What was it that J. J. Thomson actually measured? 3. Regarding

More information

Chapter 28. Atomic Physics

Chapter 28. Atomic Physics Chapter 28 Atomic Physics Quantum Numbers and Atomic Structure The characteristic wavelengths emitted by a hot gas can be understood using quantum numbers. No two electrons can have the same set of quantum

More information

Chapters 28 and 29: Quantum Physics and Atoms Questions & Problems

Chapters 28 and 29: Quantum Physics and Atoms Questions & Problems Chapters 8 and 9: Quantum Physics and Atoms Questions & Problems hc = hf = K = = hf = ev P = /t = N h h h = = n = n, n = 1,, 3,... system = hf photon p mv 8 ml photon max elec 0 0 stop total photon 91.1nm

More information

ATOMIC WORLD P.1. ejected photoelectrons. current amplifier. photomultiplier tube (PMT)

ATOMIC WORLD P.1. ejected photoelectrons. current amplifier. photomultiplier tube (PMT) ATOMIC WORLD P. HKAL PAPER I 0 8 The metal Caesium has a work function of.08 ev. Given: Planck constant h = 6.63 0 34 J s, charge of an electron e =.60 0 9 C (a) (i) Calculate the longest wavelength of

More information

6.1.5 Define frequency and know the common units of frequency.

6.1.5 Define frequency and know the common units of frequency. CHM 111 Chapter 6 Worksheet and Study Guide Purpose: This is a guide for your as you work through the chapter. The major topics are provided so that you can write notes on each topic and work the corresponding

More information

YOUR NAME Sample Final Physics 1404 (Dr. Huang)), Correct answers are underlined.

YOUR NAME Sample Final Physics 1404 (Dr. Huang)), Correct answers are underlined. YOUR NAME Sample Final Physics 1404 (Dr. Huang)), Correct answers are underlined. Useful constants: e=1.6 10-19 C, m e =9.1 10-31 kg, m p =1.67 10-27 kg, ε 0 =8.85 10-12 C 2 /N m 2, c=3 10 8 m/s k e =8.99

More information

10/4/2011. Tells you the number of protons

10/4/2011. Tells you the number of protons Atomic Structure The arrangement of the subatomic particles within the atom determines the chemical properties of the elements How they interact with one another The types of ions and structures that they

More information

Constants & Atomic Data. The birth of atomic physics and quantum mechanics. debroglie s Wave Equations. Energy Calculations. λ = f = h E.

Constants & Atomic Data. The birth of atomic physics and quantum mechanics. debroglie s Wave Equations. Energy Calculations. λ = f = h E. Constants & Atomic Data The birth of atomic physics and quantum mechanics Honors Physics Don Rhine Look inside back cover of book! Speed of Light (): c = 3.00 x 10 8 m/s Elementary Charge: e - = p + =

More information

T7-1 [255 marks] The graph shows the relationship between binding energy per nucleon and nucleon number. In which region are nuclei most stable?

T7-1 [255 marks] The graph shows the relationship between binding energy per nucleon and nucleon number. In which region are nuclei most stable? T7-1 [255 marks] 1. In the Geiger Marsden experiment alpha particles were directed at a thin gold foil. Which of the following shows how the majority of the alpha particles behaved after reaching the foil?

More information

The birth of atomic physics and quantum mechanics. Honors Physics Don Rhine

The birth of atomic physics and quantum mechanics. Honors Physics Don Rhine The birth of atomic physics and quantum mechanics Honors Physics Don Rhine Constants & Atomic Data Look inside back cover of book! Speed of Light (vacuum): c = 3.00 x 10 8 m/s Elementary Charge: e - =

More information

Chapters 31 Atomic Physics

Chapters 31 Atomic Physics Chapters 31 Atomic Physics 1 Overview of Chapter 31 Early Models of the Atom The Spectrum of Atomic Hydrogen Bohr s Model of the Hydrogen Atom de Broglie Waves and the Bohr Model The Quantum Mechanical

More information

Chapter 4. Table of Contents. Section 1 The Development of a New Atomic Model. Section 2 The Quantum Model of the Atom

Chapter 4. Table of Contents. Section 1 The Development of a New Atomic Model. Section 2 The Quantum Model of the Atom Arrangement of Electrons in Atoms Table of Contents Section 1 The Development of a New Atomic Model Section 2 The Quantum Model of the Atom Section 3 Electron Configurations Section 1 The Development of

More information

Atomic emission & absorption spectra

Atomic emission & absorption spectra Name: Date: Modern Physics Models of the Atom The word atom comes from the Greek word atomos meaning indivisible We now know that this model of the atom is not accurate JJ Thompson Experiment and atomic

More information

Particle Detectors and Quantum Physics (2) Stefan Westerhoff Columbia University NYSPT Summer Institute 2002

Particle Detectors and Quantum Physics (2) Stefan Westerhoff Columbia University NYSPT Summer Institute 2002 Particle Detectors and Quantum Physics (2) Stefan Westerhoff Columbia University NYSPT Summer Institute 2002 More Quantum Physics We know now how to detect light (or photons) One possibility to detect

More information

UNIT VIII ATOMS AND NUCLEI

UNIT VIII ATOMS AND NUCLEI UNIT VIII ATOMS AND NUCLEI Weightage Marks : 06 Alpha-particles scattering experiment, Rutherford s model of atom, Bohr Model, energy levels, Hydrogen spectrum. Composition and size of Nucleus, atomic

More information

CONCEPT MAP ATOMS. Atoms. 1.Thomson model 2.Rutherford model 3.Bohr model. 6. Hydrogen spectrum

CONCEPT MAP ATOMS. Atoms. 1.Thomson model 2.Rutherford model 3.Bohr model. 6. Hydrogen spectrum CONCEPT MAP ATOMS Atoms 1.Thomson model 2.Rutherford model 3.Bohr model 4.Emission line spectra 2a. Alpha scattering experiment 3a. Bohr s postulates 6. Hydrogen spectrum 8. De Broglie s explanation 5.Absorption

More information

Name: Electrons in Atoms Chemical Periodicity Chapters 13 and 14

Name: Electrons in Atoms Chemical Periodicity Chapters 13 and 14 Name: Electrons in Atoms Chemical Periodicity Chapters 13 and 14 1 Chapter 13 Electrons in Atoms We need to further develop our understanding of atomic structure to help us understand how atoms bond to

More information

2) The energy of a photon of light is proportional to its frequency and proportional to its wavelength.

2) The energy of a photon of light is proportional to its frequency and proportional to its wavelength. Advanced Chemistry Chapter 13 Review Name Per Show all work Wave Properties 1) Which one of the following is correct? A) ν + λ = c B) ν λ = c C) ν = cλ D) λ = c ν E) νλ = c 2) The energy of a photon of

More information

Einstein. Quantum Physics at a glance. Planck s Hypothesis (blackbody radiation) (ultraviolet catastrophe) Quantized Energy

Einstein. Quantum Physics at a glance. Planck s Hypothesis (blackbody radiation) (ultraviolet catastrophe) Quantized Energy Quantum Physics at a glance Quantum Physics deals with the study of light and particles at atomic and smaller levels. Planck s Hypothesis (blackbody radiation) (ultraviolet catastrophe) Quantized Energy

More information

PhysicsAndMathsTutor.com 1

PhysicsAndMathsTutor.com 1 Q1. When a clean metal surface in a vacuum is irradiated with ultraviolet radiation of a certain frequency, electrons are emitted from the metal. (a) Explain why the kinetic energy of the emitted electrons

More information

Higher Physics. Particles and Waves

Higher Physics. Particles and Waves Perth Academy Physics Department Higher Physics Particles and Waves Particles and Waves Homework Standard Model 1 Electric Fields and Potential Difference 2 Radioactivity 3 Fusion & Fission 4 The Photoelectric

More information

PA01. General Certificate of Education January 2007 Advanced Subsidiary Examination

PA01. General Certificate of Education January 2007 Advanced Subsidiary Examination Surname Centre Number Other Names Candidate Number For Examiner s Use Candidate Signature General Certificate of Education January 2007 Advanced Subsidiary Examination PHYSICS (SPECIFICATION A) Unit 1

More information

Unit 4. Electrons in Atoms

Unit 4. Electrons in Atoms Unit 4 Electrons in Atoms When were most of the subatomic particles discovered? Who discovered densely packed nucleus surrounded by fast moving electrons? Rutherford s Model Major development Lacked detail

More information

Exam 2 Development of Quantum Mechanics

Exam 2 Development of Quantum Mechanics PHYS420 (Spring 2002) Riq Parra Exam #2 (Friday, April 12 th, 2002) Exam 2 Development of Quantum Mechanics Do NOT write your name on this exam. Write your class ID number on the top right hand corner

More information

Light. October 16, Chapter 5: Electrons in Atoms Honors Chemistry. Bohr Model

Light. October 16, Chapter 5: Electrons in Atoms Honors Chemistry. Bohr Model Chapter 5: Electrons in Atoms Honors Chemistry Bohr Model Niels Bohr, a young Danish physicist and a student of Rutherford improved Rutherford's model. Bohr proposed that an electron is found only in specific

More information

Physics 116. Nov 21, Session 31 De Broglie, duality, and uncertainty. R. J. Wilkes

Physics 116. Nov 21, Session 31 De Broglie, duality, and uncertainty. R. J. Wilkes Physics 116 Session 31 De Broglie, duality, and uncertainty Nov 21, 2011 R. J. Wilkes Email: ph116@u.washington.edu Announcements HW 6 due today Clicker scores have been updated on Webassign gradebook

More information