Chemistry Quarter 1 Review
Name: ___________________________
Period: _____
Date: __________
Ch 3 and 4: Atomic Theory
Terms:
1. Thomson
2.
Bohr
3.
Rutherford
1.
isotope
2.
atomic number
4.
atomic mass
5.
alpha particle
6.
beta particle
Ideas:
1. What are the differences in charge of protons, neutrons and electrons? Where are they found in an atom?
3. Naturally occurring chlorine has an average atomic mass of 35.453 amu and is composed of two isotopes. The first isotope has an
atomic mass of 34.0690 and makes up 75.77 % of Chlorine atoms. What is the atomic mass of the second isotope?
4. Element
Chlorine
atomic number
17
Nitrogen
mass number
protons
neutrons
electrons
82
56
35
13
7
Barium
3.
Explain the gold foil experiment
4.
What is the frequency of a light with a wavelength of 820 nm?
5.
The energy for a quantum of light is 2.84 x 10 -19 J. What is the wavelength of this light?
6.
List the electromagnetic spectrum by increasing energy.