Obscertainer Activity Important Dates
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1 SB Atomic Structure 2015.notebook Unit 2: Atomic Structure Obscertainer Activity Important Dates Quiz #1: Wednesday, 10/1 Quiz #2: Monday, 10/5 Homework Packet: Monday, 10/5 Exam (Free Response): Wednesday, 10/7 Exam (Multiple Choice): Thursday, 10/8 : ow N Do Take a handout and an "obscertainer" How do you study something that you cannot see? Can you figure out the inner structure of your "obscertainer"? What Is An Atom? "Atom" comes from the word "atomos," which means "indivisible". Early History of the Atom POGIL Activity You should be able to... All matter is composed of ü Explain the similarities and differences between four early models of the atom. tiny particles called ü Analyze and interpret the results of Thomson s Cathode Ray Experiment and Rutherford s Gold Foil Experiment. "atoms." Democritus 400 B.C. ü Draw the atom of an element as it would appear in Dalton s model, Thomson s model, and Rutherford s model. PART 1: John Dalton's Billiard Ball Model nanoscale technology space exploration nanocars SEM atomic-sized electronic devices, like circuits and computer chips medicine communications 1
2 A Boy & His Atom Period 4 Closure Period 5 Do Now PART 2: J.J. Thomson's Plum Pudding Model 1:57 4:35 FWxd78sOZ8 PART 3: Ernest Rutherford's G0ld Foil Experiment PART 3: Ernest Rutherford's G0ld Foil Experiment Rutherford's prediction based on Thomson's "Plum Pudding" model Rutherford's observations during his Gold Foil Experiment 2
3 PART 2: J.J. Thomson's Cathode Ray Tube Experiments Rutherford Used Radioactive Samples in his Experiments HW Packet - Top of pg. 4 Bottom of pg. 3 Aim: What is the inner structure of an atom? Do Now: Define: Nucleus, Nucleons, Atomic #, Mass #?? The Atom The smallest particle of an element that has the properties of that element Reference Table Characteristics of Subatomic Particles Location Charge Mass s s You Are HERE. s Vocabulary of the Periodic Table Vocabulary of the Periodic Table Atomic Mass: Average mass of all the isotopes of an element (Mass Number: protons + neutrons) Oxidation Numbers: Possible charges an atom of an element can have Atomic Number: The number of protons in every atom of an element (Can also represent the number of electrons in a neutral atom.) Configuration: The number of electrons in each energy level; add the numbers to get the total number of electrons. Element Symbol: The letter(s) used to identify an element s: s: s: 3
4 + SB Atomic Structure 2015.notebook Vocabulary of the Periodic Table Do Now: Review of Early Atomic Theories Aim: How does changing subatomic particles affect atoms? Changing # of protons? Changing # of neutrons? Changing # of electrons? Changes atomic number Changes mass number Changes atom's identity Changes atom's charge Hydrogen Atom Carbon Atom + 4
5 + SB Atomic Structure 2015.notebook Oxygen Atom Lab: Modeling Atoms, Ions, & Isotopes Partners: Sydnie & Ali Aarthi & Sam L. Brittany F. & Jason Jang Hun & Dan Rob & Vincent Joe & Sunreet Ashley K. & Brittany M. Ashley L. & Sam Galu Kyung Jin & Blake Min Su & Hunter Min Woo & Olivia Amanda & Stop after completing this page! 5
6 + + SB Atomic Structure 2015.notebook Sodium Fluorine Sodium Chlorine 6
7 Carbon 12 and Carbon 14 Isotopes + Aim: Can you explain why atomic mass is not an integer? Do Now: 1. What element is represented by "protium"? 2. What is the difference between protium, deuterium, and tritium? 3. What term can be used to describe these three atoms? ISOTOPES: Atoms of the same element with the same number of protons, but different numbers of neutrons lightest intermediate heaviest Example: Chlorine has two isotopes which have an average atomic mass of amu: Cl-35 and Cl-37 Calculating Average Atomic Mass Try it: Naturally occurring chlorine that is put in pools is 75.53% 35 Cl (mass = amu) and 24.47% 37 Cl (mass = amu). Calculating Average Atomic Mass On Your Own... Calculate the average atomic mass. 7
8 Calculating Average Atomic Mass On Your Own... How a Mass Spectrometer Works Rapid Fire! Rapid Fire! 8
9 Rapid Fire! Rapid Fire! 9
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