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Unit 2: Atomic StructureImportant Dates

Quiz #1: Wednesday, 10/1Quiz #2: Monday, 10/5Homework Packet: Monday, 10/5Exam (Free Response): Wednesday, 10/7Exam (Multiple Choice): Thursday, 10/8

Obscertainer Activity

Take a handout and an"obscertainer"

Do Now:

Can you figure out the inner structure of your "obscertainer"?

How do you study something that you cannot see?

What Is An Atom?"Atom" comes from the word "atomos,"

which means "indivisible".

Democritus400 B.C.

All matter is composed of tiny particles called

"atoms."

https://www.youtube.com/watch?v=AsyxOWx5CE4

Early History of the Atom POGIL Activity

You should be able to...ü Explain the similarities and differences between four early models of the atom.

ü Analyze and interpret the results of Thomson‛s Cathode Ray Experiment and Rutherford‛s Gold Foil Experiment.

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 Modelnanocars

SEMatomic-sized electronic devices, like circuits and computer chips

nanoscale technology

medicinecommunications

space exploration

https://www.youtube.com/watch?v=IibY5H8p2jg

https://www.youtube.com/watch?v=XZVH7CASrBk

https://www.youtube.com/watch?v=WOqEk440JZ8

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A Boy & His AtomPeriod 4 Closure

Period 5 Do NowPART 2: J.J. Thomson's Plum Pudding Model

1:57

‐ 4

:35

https://www.youtube.com/watch?v=­FWxd78sOZ8

PART 3: Ernest Rutherford's G0ld Foil Experiment

PART 3: Ernest Rutherford's G0ld Foil Experiment

Rutherford's prediction basedon Thomson's "Plum Pudding" model

Rutherford's observations during his Gold Foil Experiment

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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 #

You Are HERE.

? ?

The AtomThe smallest particle of an element that has

the properties of that element

Reference Table ____Characteristics of Subatomic Particles

Location Charge Mass

Protons

Neutrons

Electrons

Vocabulary of the Periodic Table

Atomic Mass: Average mass of all the isotopes of an element(Mass Number: protons + neutrons)

Atomic Number: The number of protons in every atom of an element(Can also represent the number of electrons in a neutral atom.)

Electron 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

Oxidation Numbers: Possible charges an atom of an element can have

Vocabulary of the Periodic Table

Protons: _____________

Neutrons: ____________

Electrons: ____________

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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 chargeChanges mass

number

Neutron

Proton

Electron

Hydrogen Atom

+

Neutron

Proton

Electron

+

Carbon Atom

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Neutron

Proton

Electron

+

Oxygen Atom

Lab: Modeling Atoms, Ions, & Isotopes

Partners:Sydnie & Ali

Aarthi & Sam L.Brittany F. & JasonJang Hun & DanRob & VincentJoe & Sunreet

Ashley K. & Brittany M.Ashley L. & Sam Galu

Kyung Jin & BlakeMin Su & HunterMin Woo & Olivia

Amanda &

Stop after completing this page!

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September 24, 2015

Neutron

Proton

Electron

+

Sodium Fluorine

Neutron

Proton

Electron

+

Sodium Chlorine

https://www.youtube.com/watch?v=VBReOjo3ri8

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September 24, 2015

Neutron

Proton

Electron

Carbon­12 and Carbon­14Isotopes

+

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

heaviest

lightest

intermediate

Example: Chlorine has two isotopes which have an average atomic mass of

35.453 amu: Cl-35 and Cl-37

Calculating Average Atomic MassTry it:

Naturally occurring chlorine that is put in pools is 75.53% 35Cl (mass = 34.969 amu) and 24.47% 37Cl (mass = 36.966 amu).

Calculate the average atomic mass.

Calculating Average Atomic MassOn Your Own...

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Calculating Average Atomic MassOn Your Own...

How a Mass Spectrometer Works

Rapid Fire! Rapid Fire!

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September 24, 2015

Rapid Fire! Rapid Fire!