Download Atomic Theory Worksheet

Name ______________________________________
Chemistry
Atomic Theory Worksheet
1. Describe what was involved in JJ Thomson’s study of the Cathode Ray Tube.
2. Describe what was involved in R. Millikan’s Oil Drop Experiment.
3. Describe what was involved in E. Rutherford’s Gold Foil Experiment.
4. Atoms are very small, what unit are they measured in?
5. What holds an atom together?
6. Label the parts on the following diagram of an atom:
7. Identify the key properties of the following atomic particles:
Atomic Particle
Proton
Neutron
Electron
Symbol
Charge
Mass
8. Identify how you would determine the following information:
a. number of protons =
b. number of electrons =
c. number of neutrons =
d. mass number =
e. the charge on an ion =
9. What does it mean for an atom to be
a. neutral –
b. an ion –
c. an isotope 10. How do you represent an isotope (how is it to be written)?
11. What does amu stand for?
12. What is a nuclear symbol? Give an example and tell what it is made up of.
13. Complete the following chart:
Element
Element
Atomic
Atomic
Name
Symbol
Mass
Number
Tin
Mn
78
Helium
P
Mass
Number
Number Number Number
Protons Neutrons Electrons