Do Now
Write
down anything about which
you are unclear for the following
topics:
Atomic
Theory
Nuclear Chemistry
Electron configurations
Unit 2 Review Day
Williamsburg High School for Architecture and Design
Mr. Quinn and Ms. Tom
11/7/13
Aim
How
is the atom constructed?
Atomic Theory Overview
Plum
Pudding Model  Electrons
Rutherford Model  Nucleus
Bohr Model  Orbits
Wave Mechanical Model  Orbitals
Check Yo’ Self, Part 1

What particles are located inside the
nucleus?



What is the sign of the charge of a nucleus?
What is the charge of a proton?
What is the mass of a proton and neutron?
 What
is the sign of a charge on an
electron?
The Nucleus: an Overview
Atomic
Number
Atomic mass
Isotopes
Nomenclature
Number of protons
Number of protons + neutrons
Same protons, different neutrons
Check Yo’ Self, Part 2

How many electrons, protons, and neutrons does a Kr-85 atom have?

Which isotopic notation represents an atom of carbon-14?
1.
6
8C
2.
8
6C
3.
6
14C
4.
14
6C
Nuclear Chemistry
Half-Life
Definition  The time for half of a radioactive sample to decay
Equation
Nuclear
Decay Equations
Check Yo’ Self, Part 3
 If
an object has decayed for 3 half-lives,
what fraction of the original remains?
 Balance
the following nuclear decay
equation:

_________________→ 42He + 20682Pb
Electron Configurations
 Bohr
Model: shells
 Wave
Mechanical model: orbitals
Check Yo’ Self, Part 4 Part 1

A bromine atom in an
excited state could have an
electron configuration of
1.
2-8-18-6
2.
2-8-18-7
3.
2-8-17-7
4.
2-8-17-8

Identify 2 gases in the mixture
Check Yo’ Self, Part 4 Part 2

Write the electron
configuration for
phosphorus in the ground
state using orbital and
electron spin notation.
Now, it’s your turn!