Download 1 CP Chemistry 2013-2014 Chapter 3 Notes Name: Important Vocab

CP Chemistry 2013-2014
Chapter 3 Notes
Name:
Atoms
JJ Thomson
Law of multiple prop
Bohr model of atom
Oil drop experiment
Protons
Isotopes
Important Vocab
Democritus
Lavosier
Law of def proportions Millikan
Dalton
Rutherford
Plum pudding
alpha particles
Nucleus
Atomic number
Electrons
Neutrons
Atomic mass unit
Section 3-1
Actual science began around:
The first person to mention idea of an atom was:
Atomos means:
What has happened over the years to the idea of the atom and why:
What evidence do we have that matter is made of atoms?:
Antoine Lavoisier: father of Modern Chemistry?
a.
b.
c.
d.
1
Law of conservation of mass
Cathode ray experiment
Bohr
Gold foil experiment
Mass number
Atomic mass
Law of conservation of mass-energy:
Ex:
Law of definite proportions:
Ex:
Law of multiple proportions:
Ex:
John Dalton: father of modern chemistry?
1803 Dalton’s original atomic theory
a.
b.
c.
d.
Dalton’s model of the atom:
How has the original theory been modified? Why?
2
Section 3-2
JJ Thomson 1897
The experimental apparatus looked like:
Thomson was able to:
a.
b.
c.
Robert Millikan 1909
The experimental apparatus looked like:
Millikan was able to:
a.
b.
Ernest Rutherford 1911
What did the experimental apparatus look like?
Who performed the actual experiment?
What are alpha particles?
3
The observations from the gold foil experiment are:
The results from the gold foil experiment are:
What does this mean to us?
What are some analogies that help us to understand the size of the atom:
a.
b.
So, how big are atoms?
What is the nucleus?
The three basic subatomic particles
Name
Where it is located
relative mass (u)
Section 3-3
Atomic number:
Ex:
4
Actual mass (g)
relative charge
Actual charge (C)
Mass number:
Ex:
Isotopes:
Ex: Chlorine
Ex: Hydrogen
Nuclear symbols:
Ex:
a.
b.
How do we determine the number of protons, electrons and neutrons are in an atom?:
a.
b.
c.
d.
Fill in the following table (check projector for filled in information)
Name
Symbol
Atomic #
Mass #
#
#
protons neutrons
1
2
3
4
5
6
7
8
9
5
#
electrons
Charge
How does one calculate the average atomic mass (or atomic mass)?  weighted average
Ex:
a. Chlorine
b.
c.
d.
How is this different from a normal average?
Ex: test scores
6