Charge to mass Ratio. Nature of the Atom: Dalton's Contributions to Science. 6) qm ratio notes.notebook. December 13, 2018
|
|
- Quentin Bates
- 5 years ago
- Views:
Transcription
1 Nature of the Atom: Charge to mass Ratio Studies of atoms from John Dalton's atmospheric studies indicated that properties were cyclic moving from group to group. This suggested some unit of atomic structure existed from group to group. Atoms of different elements differ in the amount and arrangement of these units. In 1855, Heinrich Geissler invented a powerful vacuum pump. Dalton's Contributions to Science 1
2 Cathode Rays: Julius Plucker connected an evacuated tube to a battery and noticed that current still flows at low pressure. With an anode and a cathode added to the tube, a glow was observed. Eugen Goldstein named these rays cathode rays. They were produced by a cathode and by passing current through a gas, the glow was observable to a better degree. 2
3 Crookes In 1875, Sir William Crookes used a bent tube and noticed that the glow did not follow the bend but travelled in a straight line like light. Crookes, in his experiments placed a Maltese cross at the end of the tube. He reasoned that a barrier would stop the rays and it did produce shadows. 3
4 Cathode Ray Properties: 1) Cathode rays travel in a straight line (rectilinear propagation) perpendicular to the surface of the cathode and therefore produce shadows. 2) Magnetic fields deflect cathode ray's path. 3) Charged objects deflect cathode ray's path. 4) They produce chemical reactions that are triggered by light (silver salts change colour in light or cathode rays.) 5) Changing the material of the cathode still produced cathode rays. 4
5 Magnetic and Electric Fields As magnetic fields affect them they behave like an electric current. The electric field tests verified that there were negative particles in cathode rays. In 1897, J.J. Thomson ( ) proved finally that cathode rays are negatively charged particles (electrons). He passed them through electric and magnetic fields to get their charge - to mass ratio. He found that all cathode rays had a q/m = 1.76 x C/kg 5
6 A magnetic field alone would cause perpendicular particles to travel in a circle: F c = F m A magnetic field can deflect cathode rays into circular paths! mv 2 = qvb r q = v m Br Need: v, B and r --> B is controlled by the coils generating the magnetic field (Number of turns of wire, type of metal, radius, current) and r could be measured. Need to find the speed of the charges! 6
7 The next part of the experiment: add an electric field to counteract the magnetic field deflection...cathode rays went into a straight line again. Fm = Fe qvb = q E v = E B Note: E is determined by applied voltage V and plate separation d: E = V/d Now the charge to mass ratio was found: for cathode rays derived from any metal, the ratio was the same. Therefore all these materials shared some common component - electrons! 7
8 8
9 Thomson found that cathode ray particles are: 1) emitted by a wide variety of cathode materials. 2) smaller in mass than hydrogen (the smallest known particle in those days). 1. The electron is a fundamental particle of matter. 2. With Millikan's oil drop experiment, the charge of the electron was known so the mass of the electron was found. 3. The H ion is 1836 me 1.66 x kg (atomic mass unit) and this was the smallest known particle at the time. 9
10 Example: An accelerating potential of 250 V is used on chlorine ions before entering a 1.00 T magnetic field. Chlorine gains an electron to become a stable ion. There are two isotopes of chlorine (Cl-35 and Cl-37) with masses of 5.80 x kg and 6.10 x kg respectively. Find the radii of the isotopes in the magnetic field. 1 10
11 Example 2: Determine the charge to mass ratio for the following situation: a) An electric field using 232 V applied to parallel plates 2.33 cm apart, straightens a beam of charged particles in a magnetic field of 23.7 T. b) In the 23.7 T magnetic field, the charged particles are deflected into a radius of 2.33 mm x 10 3 C/kg 11
12 IB Homework: Giancoli Page 799 #1, 2, Page 802 #93 and q/m worksheet. 4U Homework: q/m worksheet 12
13 13
Chapter 1 The discovery of the electron 1.1 Thermionic emission of electrons
Chapter 1 The discovery of the electron 1.1 Thermionic emission of electrons Learning objectives: What are cathode rays and how were they discovered? Why does the gas in a discharge tube emit light of
More informationPhysicsAndMathsTutor.com 1
PhysicsAndMathsTutor.com 1 1. Millikan determined the charge on individual oil droplets using an arrangement as represented in the diagram. The plate voltage necessary to hold a charged droplet stationary
More informationHomework 2: Forces on Charged Particles
Homework 2: Forces on Charged Particles 1. In the arrangement shown below, 2 C of positive charge is moved from plate S, which is at a potential of 250 V, to plate T, which is at a potential of 750 V.
More informationEXPERIMENT 2-6. e/m OF THE ELECTRON GENERAL DISCUSSION
Columbia Physics: Lab -6 (ver. 10) 1 EXPERMENT -6 e/m OF THE ELECTRON GENERAL DSCUSSON The "discovery" of the electron by J. J. Thomson in 1897 refers to the experiment in which it was shown that "cathode
More informationv = E B FXA 2008 UNIT G485 Module Magnetic Fields BQv = EQ THE MASS SPECTROMETER
UNIT G485 Module 1 5.1.2 Magnetic Fields 11 Thus, in order for the particle to suffer NO DEFLECTION and so exit the device at Y : From which : MAGNETIC FORCE UP = ELECTRIC FORCE DOWN BQv = EQ THE MASS
More informationChapter 38. The End of Classical Physics
Chapter 38. The End of Classical Physics Studies of the light emitted by gas discharge tubes helped bring classical physics to an end. Chapter Goal: To understand how scientists discovered the properties
More informationWinmeen Tnpsc Group 1 & 2 Study Materials
23. Atomic Structure 1. What is atom? Atoms are the building blocks of all matter. Atoms are extremely small in size and are expressed in terms of 10-10 m (1 A ) 2. What is atom in Greek language? In Greek
More information4. The discovery of X-rays and electrons 4.1 Gas discharges
4. The discovery of X-rays and electrons 4.1 Gas discharges 19 th century: knowledge of charged atoms/molecules electrolysis discharges of rarefied gases (vacuum). near cathode: glow charge, cathode rays
More informationPhysics 30 Modern Physics Unit: Atomic Basics
Physics 30 Modern Physics Unit: Atomic Basics Models of the Atom The Greeks believed that if you kept dividing matter into smaller and smaller pieces, you would eventually come to a bit of matter that
More informationDiscovered by German scientist Johann Hittorf in 1869 and in 1876 named by Eugen Goldstein.
DO PHYSICS ONLINE CATHODE RAYS CATHODE RAYS (electron beams) Streams of electrons (negatively charged particles) observed in vacuum tubes - evacuated glass tubes that are equipped with at least two metal
More informationThis lab was adapted from Kwantlen University College s Determination of e/m lab.
e /m: Charge to Mass Ratio of the Electron This lab was adapted from Kwantlen University College s Determination of e/m lab. Purpose To determine the charge to mass ratio of the electron, e /m, using Helmholtz
More informationPhysicsAndMathsTutor.com 1
PhysicsAndMathsTutor.com 1 Q1. (a) The diagram below shows a narrow beam of electrons produced by attracting electrons emitted from a filament wire to a metal plate which has a small hole in it. (i) Why
More informationChapter 23 Electric Potential. Copyright 2009 Pearson Education, Inc.
Chapter 23 Electric Potential Units of Chapter 23 Electric Potential Energy and Potential Difference Relation between Electric Potential and Electric Field Electric Potential Due to Point Charges Potential
More informationRatio of Charge to Mass (e/m) for the Electron
Objective: In this experiment you will determine the ratio of charge to mass (e/m) of the electron, by measuring the deflecting of electrons as they move through a magnetic field. Apparatus: e/m apparatus
More informationYou should be able to demonstrate and show your understanding of:
OCR B Physics H557 Module 6: Field and Particle Physics You should be able to demonstrate and show your understanding of: 6.1: Fields (Charge and Field) Field: A potential gradient Field Strength: Indicates
More informationRatio of Charge to Mass for the Electron
Ratio of Charge to Mass for the Electron For a positive charge moving in a uniform magnetic field B with velocity v, the force F on the charge is always perpendicular to the magnetic field and the velocity.
More informationELECTROMAGNETIC WAVES
VISUAL PHYSICS ONLINE MODULE 7 NATURE OF LIGHT ELECTROMAGNETIC WAVES SPECTRA PRODUCED BY DISCHARGE TUBES CATHODE RAYS (electron beams) Streams of electrons (negatively charged particles) observed in vacuum
More informationPHYSICS 12 NAME: Electrostatics Review
NAME: Electrostatics Review 1. An electron orbits a nucleus which carries a charge of +9.6 x10-19 C. If the electron s orbital radius is 2.0 x10-10 m, what is its electric potential energy? A. -6.9 x10-18
More information4-1 Notes. Defining the Atom
4-1 Notes Defining the Atom Early Models of the Atom All matter is composed of atoms Atoms are the smallest particles of an element that retains their identity in a chemical reaction Greek philosopher
More informationDemocritus 460 BC 370 BC. First scholar to suggest that atoms existed. Believed that atoms were indivisible and indestructible.
Democritus 460 BC 370 BC First scholar to suggest that atoms existed. Believed that atoms were indivisible and indestructible. Democritus 460 BC 370 BC Problems with theory: 1. Did not explain chemical
More informationLab 6 - ELECTRON CHARGE-TO-MASS RATIO
101 Name Date Partners OBJECTIVES OVERVIEW Lab 6 - ELECTRON CHARGE-TO-MASS RATIO To understand how electric and magnetic fields impact an electron beam To experimentally determine the electron charge-to-mass
More informationGravitational Fields Review
Gravitational Fields Review 2.1 Exploration of Space Be able to: o describe planetary motion using Kepler s Laws o solve problems using Kepler s Laws o describe Newton s Law of Universal Gravitation o
More informationChapter 4. Atomic Structure
Chapter 4 Atomic Structure Warm Up We have not yet discussed this material, but what do you know already?? What is an atom? What are electron, neutrons, and protons? Draw a picture of an atom from what
More informationLab 6 - Electron Charge-To-Mass Ratio
Lab 6 Electron Charge-To-Mass Ratio L6-1 Name Date Partners Lab 6 - Electron Charge-To-Mass Ratio OBJECTIVES To understand how electric and magnetic fields impact an electron beam To experimentally determine
More informationEarly Atomic Theory. Alchemy. The atom
Early Atomic Theory Chapter 3 Democritus 460 BC- ~ 370 BC Nothing exists except atoms and empty space; everything else is opinion. Matter is composed of small indivisible particles, atomos meaning Indivisible
More informationMagnetic force and magnetic fields
magnetar Magnetic force and magnetic fields Feb 28, 2012 Magnetic field Iron filings may be used to show the pattern of the magnetic field lines. A compass can be used to trace the field lines. The lines
More informationCharge to Mass Ratio of The Electron
Introduction Charge to Mass Ratio of The Electron The electron was first discovered by Sir J.J. Thomson in 1897 at the Cavendish Laboratory in Cambridge, England. His experimental apparatus is not very
More informationLaboratory 14: Ratio of Charge to Mass for the Electron
Laboratory 14: Ratio of Charge to Mass for the Electron Introduction The discovery of the electron as a discrete particle of electricity is generally credited to the British physicist Sir J. J. Thomson
More informationProbing the Atom 13.1 THE PERIODIC TABLE
3637_CassidyTX_13 6/20/02 3:40 PM Page 585 Probing the Atom R13 C H A P T E + - 13.1 The Periodic Table 13.2 The Idea of Atomic Structure 13.3 Cathode Rays 13.4 The Smallest Charge 13.5 Thomson s Model
More informationThe Nature of Matter Textbook Inside the Atom. 1) Explain how scientists discovered particles of an atom.
Models of the Atom The Nature of Matter Textbook Inside the Atom 1) Explain how scientists discovered particles of an atom. 2) Explain how today's model of the atom was developed. 3) Describe the structure
More informationLecture 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 informationPre Lab for Ratio of Mass to. Charge of an Electron
Pre Lab for Ratio of Mass to Charge of an Electron The direction of the magnetic force on a charged particle moving in the magnetic field is given by the right hand rule. Students need practice using the
More informationElectric Potential Energy
Electric Potential Energy the electric potential energy of two charges depends on the distance between the charges when two like charges are an infinite distance apart, the potential energy is zero An
More informationP Q 2 = -3.0 x 10-6 C
1. Which one of the following represents correct units for electric field strength? A. T B. N/C C. J / C D. N m 2 /C 2 2. The diagram below shows two positive charges of magnitude Q and 2Q. P Q 2Q Which
More informationMAGNETISM LAB: The Charge-to-Mass Ratio of the Electron
Physics 7B Charge-to-mass: e/m p. 1 NAME: DL SECTION NUMBER: GSI: LAB PARTNERS: MAGNETISM LAB: The Charge-to-Mass Ratio of the Electron Introduction In this lab you will explore the motion of a charged
More informationModels of the Atom The Nature of Matter Textbook Inside the Atom
Models of the Atom The Nature of Matter Textbook Inside the Atom 1) Explain how scientists discovered particles of an atom. 2) Explain how today's model of the atom was developed. 3) Describe the structure
More information2 Copyright Pearson Education, Inc., or its affiliates. All Rights Reserved.
CHEMISTRY & YOU Chapter 4 Atomic Structure 4.1 Defining the Atom 4.2 Structure of the Nuclear Atom How did scientists determine the structures that are inside an atom? X-rays are used to see structures
More informationLab 5 - ELECTRON CHARGE-TO-MASS RATIO
81 Name Date Partners Lab 5 - ELECTRON CHARGE-TO-MASS RATIO OBJECTIVES To understand how electric and magnetic fields impact an electron beam To experimentally determine the electron charge-to-mass ratio
More informationKE = 1 2 mv2 = ev. (1)
The e/m ratio Objective To measure the electronic charge-to-mass ratio e/m, by injecting electrons into a magnetic field and examining their trajectories. We also estimate the magnitude of the earth s
More informationExperiment 1 1. Charge- to- Mass Ratio of the Electron Physics 2150 Experiment No. 1 University of Colorado
Experiment 1 1 Introduction Charge- to- Mass Ratio of the Electron Physics 2150 Experiment No. 1 University of Colorado Both the charge and the mass of the electron are fundamental constants of considerable
More informationChapter 8 Composition of the Atom
Chapter 8 Composition of the Atom 8-1 Scientific Modelling Scientists use models to help explain things that cannot be observed. This happens all the time; consider a globe for example. Scientific models
More informationCHAPTER 4 Atomic Structure
CHAPTER 4 Atomic Structure 4.1 Early Theories of Matter Earth, Water, Air, Fire Matter was thought to be infinitely divisible No method was available to test theories Democritus (460 B.C. 370 B.C.) First
More informationCharge to Mass Ratio of Electron Lab 11 SAFETY
HB 10-20-08 Charge to Mass Ratio of Electron Lab 11 1 Charge to Mass Ratio of Electron Lab 11 Equipment ELWE e/m tube, ELWE Helmholtz coils, ELWE 4 voltage power supply, Safety Glasses, Fluke multimeter,
More informationCharge to Mass Ratio of The Electron
Physics Topics Charge to Mass Ratio of The Electron If necessary, review the following topics and relevant textbook sections from Serway / Jewett Physics for Scientists and Engineers, 9th Ed. Electric
More information4.2 Structure of the Nuclear Atom > Chapter 4 Atomic Structure. 4.2 Structure of the Nuclear Atom. 4.1 Defining the Atom
Chapter 4 Atomic Structure 4.1 Defining the Atom 4.2 Structure of the Nuclear Atom 4.3 Distinguishing Among Atoms 1 CHEMISTRY & YOU How did scientists determine the structures that are inside an atom?
More informationDemocritus & Leucippus (~400 BC) Greek philosophers: first to propose that matter is made up of particles called atomos, the Greek word for atoms
AP Chemistry Ms. Ye Name Date Block The Evolution of the Atomic Model Since atoms are too small to see even with a very powerful microscope, scientists rely upon indirect evidence and models to help them
More information1 (a) Define magnetic flux [1]
1 (a) Define magnetic flux..... [1] (b) Fig. 4.1 shows a generator coil of 5 turns and cross-sectional area 2.5 1 3 m 2 placed in a magnetic field of magnetic flux density.35 T. The plane of the coil is
More informationDemocritus & Leucippus (~400 BC) Greek philosophers: first to propose that matter is made up of particles called atomos, the Greek word for atoms
Chemistry Ms. Ye Name Date Block The Evolution of the Atomic Model Since atoms are too small to see even with a very powerful microscope, scientists rely upon indirect evidence and models to help them
More informationAdvanced Higher Physics. Electromagnetism
Wallace Hall Academy Physics Department Advanced Higher Physics Electromagnetism Problems AH Physics: Electromagnetism 1 2013 Data Common Physical Quantities QUANTITY SYMBOL VALUE Gravitational acceleration
More information1. Based on Dalton s evidence, circle the drawing that demonstrates Dalton s model.
Various models of the ATOM Dalton Model John Dalton developed the first atomic model in 1808. Before him people, mostly philosophers, had speculated about the smallest unit of matter and two theories prevailed.
More informationSparks in Gases: Line Spectra
Lecture 11 February 4, Chapter 3 The Particlelike Properties of Electromagnetic Radiation Sparks in Gases: Line Spectra This is one of the oldest tools available for the investigation of atoms and radiation.
More informationEarly Atomic Theories and the Origins of Quantum Theory. Chapter 3.1
Early Atomic Theories and the Origins of Quantum Theory Chapter 3.1 What is Matter Made of? People have wondered about the answer to this question for thousands of years Philosophers Matter is composed
More informationDual Nature of Matter and Radiation 9. The work function of a certain metal is 3.3 J. Then the maximum kinetic energy of photoelectrons emitted by incident radiation of wavelength 5 A is- ).48 ev ).4 ev
More informationHW7: Ch. 26 P 34, 36 Ch.27 Q 2, 4, 8, 18 P 2, 8, 17, 19, 37
Fall 12 PHY 122 Homework Solutions #7 HW7: Ch. 26 P 34, 36 Ch.27 Q 2, 4, 8, 18 P 2, 8, 17, 19, 37 Chapter 26 Problem 34 Determine the magnitudes and directions of the currents in each resistor shown in
More informationθ θ θ θ current I Fig. 6.1 The conductor and the magnetic field are both in the plane of the paper. State
3 1 (a) A straight conductor carrying a current I is at an angle θ to a uniform magnetic field of flux density B, as shown in Fig. 6.1. magnetic field, flux density B θ θ θ θ current I Fig. 6.1 The conductor
More informationChapter 27 Magnetism 1/20/ Magnets and Magnetic Fields Magnets and Magnetic Fields Magnets and Magnetic Fields
Chapter 27 Magnetism Magnets have two ends poles called north and south. Like poles repel; unlike poles attract. However, if you cut a magnet in half, you don t get a north pole and a south pole you get
More informationChapter 4. History of the atom. History of Atom Smallest possible piece? Atomos - not to be cut. Atoms and their structure
Chapter 4 Atoms and their structure History of the atom Not the history of atom, but the idea of the atom. Original idea Ancient Greece (400 B.C.) Democritus and Leucippus Greek philosophers. Looked at
More informationChapter 5. Early Atomic Theory and Structure
Chapter 5 Early Atomic Theory and Structure 1 5.1 Early thoughts ~ 400 B.C. Greek philosophers Empedocles all matter was composed of four elements earth, air, water, fire Democritus all forms of matter
More informationPSI 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 informationLab 5 - ELECTRON CHARGE-TO-MASS RATIO
79 Name Date Partners OBJECTIVES OVERVIEW Lab 5 - ELECTRON CHARGE-TO-MASS RATIO To understand how electric and magnetic fields impact an electron beam To experimentally determine the electron charge-to-mass
More informationQuantum 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 informationToday s lecture: Motion in a Uniform Magnetic Field continued Force on a Current Carrying Conductor Introduction to the Biot-Savart Law
PHYSICS 1B Today s lecture: Motion in a Uniform Magnetic Field continued Force on a Current Carrying Conductor Introduction to the Biot-Savart Law Electricity & Magnetism A Charged Particle in a Magnetic
More informationCH4 HOMEWORK : ATOMIC STRUCTURE
Name Date Class 4 CH4 HOMEWORK : ATOMIC STRUCTURE SECTION 4.1 DEFINING THE ATOM (pages 101 103) This section describes early atomic theories of matter and provides ways to understand the tiny size of individual
More informationMagnetic Fields & Forces
Magnetic Fields & Forces Oersted discovered that an electric current will produce a magnetic field around conductor only a moving charge creates a magnetic field the magnetic field is circular around the
More informationCh. 4 Notes THE STRUCTURE OF THE ATOM NOTE: Vocabulary terms are in boldface and underlined. Supporting details are in italics.
Ch. 4 Notes THE STRUCTURE OF THE ATOM NOTE: Vocabulary terms are in boldface and underlined. Supporting details are in italics. I. Early Ideas About Matter A. atom the smallest particle of an element retaining
More informationDemocritus of Abdera. John Dalton. Dalton s Atom. Dalton s Atomic Theory Ancient Greece - 4th century BC. Eaglesfield, England
Democritus of Abdera Ancient Greece - 4th century BC first suggested the existence of tiny fundamental particles that make up matter. atoms = indestructible did not agree with the current sci theory -
More information1 Fig. 3.1 shows the variation of the magnetic flux linkage with time t for a small generator. magnetic. flux linkage / Wb-turns 1.
1 Fig. 3.1 shows the variation of the magnetic flux linkage with time t for a small generator. 2 magnetic 1 flux linkage / 0 10 2 Wb-turns 1 2 5 10 15 t / 10 3 s Fig. 3.1 The generator has a flat coil
More informationD. To the right (Total 1 mark)
1. An electron passes the north pole of a bar magnet as shown below. What is the direction of the magnetic force on the electron? A. Into the page B. Out of the page C. To the left D. To the right 2. A
More informationDiscovery 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 informationMagnetism Chapter Questions
Magnetism Chapter Questions 1. Both Electric and Magnetic Forces will cause objects to repel and attract each other. What is a difference in the origin of these forces? 2. A Magnet has a north and a south
More informationExperiment 5 Deflection of Electrons
Experiment 5 Deflection of Electrons Every statement in physics has to state relations between observable quantities. E. Mach OBJECTIVES To determine the effect of electric and magnetic fields on a beam
More informationChapter 27 Magnetism. Copyright 2009 Pearson Education, Inc.
Chapter 27 Magnetism 27-1 Magnets and Magnetic Fields Magnets have two ends poles called north and south. Like poles repel; unlike poles attract. 27-1 Magnets and Magnetic Fields However, if you cut a
More informationChapter 2 Atoms and Elements
Chapter 2 Atoms and Elements Law of Conservation of Mass in a chemical reaction, matter is neither created nor destroyed total mass of the materials you have before the reaction must equal the total mass
More informationMagnetic Fields & Forces
Magnetic Fields & Forces Oersted discovered that an electric current will produce a magnetic field around conductor only a moving charge creates a magnetic field the magnetic field is circular around the
More informationNYS Master Teacher Program March 2016
Top Hat The join code is 0874 To participate in the cell phone polling, Text to (315) 636-0905 the four digit code for each question followed by the response. Which of the following best describes you?
More informationThe Structure of the Atom
Main Ideas Atoms contain positive and negative particles. Atoms have small, dense, positively-charged nuclei. A nucleus contains protons and neutrons. The radii of atoms are expressed in picometers. FIGURE
More informationWhat is matter? Matter is anything that has mass and takes up space. What is matter made of??
What is matter? Matter is anything that has mass and takes up space What is matter made of?? Atoms. All matter is made of atoms. Atoms are the building blocks of Matter Remember???? The Cell theory - 3
More informationThe History of the Atom. How did we learn about the atom?
The History of the Atom How did we learn about the atom? The Atomic Theory of Matter All matter is made up of fundamental particles. What does fundamental mean? The Greek Philosophers, 400 B.C. Democritus
More informationName Date Class ATOMIC STRUCTURE
4 ATOMIC STRUCTURE SECTION 4.1 DEFINING THE ATOM (pages 101 103) This section describes early atomic theories of matter and provides ways to understand the tiny size of individual atoms. Early Models of
More informationDeflection of Electrons
Deflection of Electrons Every statement in physics has to state relations between observable quantities. E. Mach (1838-1916) OBJECTIVES To determine the effect of electric and magnetic fields on a beam
More informationSPH 4U: Unit 3 - Electric and Magnetic Fields
Name: Class: _ Date: _ SPH 4U: Unit 3 - Electric and Magnetic Fields Modified True/False (1 point each) Indicate whether the statement is true or false. If false, change the identified word or phrase to
More information2.1 Evidence for the existence of the electron
2. The Atom 2.1 Evidence for the existence of the electron The universe consists of energy & matter. Matter occupies space and has mass. Law of conservation of mass states matter is neither created nor
More informationPhysics The Motion of Charged Particles in Electric Fields Figure 1 use considerations of energy to analyze its motion Figure 2
Physics 12 The Motion of Charged Particles in Electric Fields In Figure 1, the charge q 1 experiences a Coulomb force, to the right in this case, whose magnitude is given by It simply means that if q 1,
More informationTHE CHARGE-TO-MASS RATIO OF THE ELECTRON
THE CHARGE-TO-MASS RATIO OF THE ELECTRON Is the beam that produces images on a cathode ray tube (CRT) television or computer monitor a beam of particles or of waves? This was a lively source of debate
More informationChapter 2 Atoms and Elements
1 Chapter 2 Atoms and Elements Sec 2.3 Modern Atomic Theory and the Laws That Led to it Law of conservation of mass states that in a chemical reaction, matter is neither created nor destroyed. Law of definite
More informationChapter 27 Magnetic Field and Magnetic Forces
Chapter 27 Magnetic Field and Magnetic Forces Lecture by Dr. Hebin Li Goals for Chapter 27 To study magnets and the forces they exert on each other To calculate the force that a magnetic field exerts on
More informationE/M. Hunter Layman Bridgewater College 1/16/2016
E/M Hunter Layman Bridgewater College 1/16/016 Abstract The charge to mass ratio of an electron was observed in the experiment. This experiment involved the use of a PASCO scientific Model SE 9638 e/m
More informationPHYSICS 12 NAME: Magnetic Field and Force
NAME: Magnetic Field and Force 1. An aircraft whose wingspan is 15 m carries a static charge of 0.60 C. It travels at 240 m/s perpendicular to a 1.5x10-4 T magnetic field. What magnetic force does the
More informationChapter 4 The Atom. Philosophers and scientists have proposed many ideas on the structure of atoms.
Chapter4 TheAtom 4.1 Early Models of the Atom An atom is the smallest particle of an element that retains its identity in a chemical reaction. Philosophers and scientists have proposed many ideas on the
More informationChapter 2: The Atomic Nature of Matter Olmsted and Williams, 3 rd Edition
Chapter 2: The Atomic Nature of Matter Olmsted and Williams, 3 rd Edition HW: 5, 7, 10, 13, 15, 17, 19, 22, 23, 27, 30, 31, 35, 36, 41, 42, 59, 63, 69, 70 Atomic Theory and How It Came About Aristotle
More informationA = number of protons + number of neutrons Z = number of protons
Worksheet 3 Fundamentals Objectives To understand and be able to apply the fundamental laws. The Law of Conservation of Mass Mass can be neither created nor destroyed in a chemical reaction. The Law of
More informationChapter 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 information10/15/2010. First Thoughts. First Thoughts
0/5/200 First Thoughts First Thoughts People began wondering about matter more than 2,500 years ago. Some of the early philosophers thought that matter was composed of tiny particles. They reasoned that
More informationMemorial to a Scientist
Memorial to a Scientist 1. My Question of Inquiry: Use this sheet to outline how you will collect and present the information to the class. My Group s Scientist: 1 Part I: Memorial to a Scientist: John
More informationElectron charge-to-mass ratio
(ta initials) first name (print) last name (print) brock id (ab17cd) (lab date) Experiment 4 Electron charge-to-mass ratio In this Experiment you will learn the relationship between electric and magnetic
More informationMagnetism Practice Problems PSI AP Physics B
Magnetism Practice Problems PSI AP Physics B Name 1. A straight wire carries a current down. What is the direction of the magnetic field at the point to the East from the wire? (A) West (B) East (C) North
More informationUpdating the Atomic Theory
Updating the Atomic Theory On the basis of Dalton s Atomic Theory: An atom is the basic unit of an element that can enter into chemical combination. Three major differences between modern atomic theory
More information4. Electron Charge-to-Mass Ratio
e/m 4. Electron Charge-to-Mass Ratio 4.1 Introduction In this laboratory, we study the interaction of electrons and a magnetic field, with the specific purpose to determine the electron charge-to-mass
More informationMass of the Electron
PHY 192 Charge and Mass of the Electron Spring 2013 1 Mass of the Electron Motivation for the Experiment The aim of this experiment is to measure the mass of the electron. The mass will be deduced from
More informationChapter 4: Atomic Structure Section 4.1 Defining the Atom
Chapter 4: Atomic Structure Section 4.1 Defining the Atom Early Models of the Atom atom the smallest particle of an element that retains its identity in a chemical reaction Democritus s Atomic Philosophy
More information