Atomic Structure And The Periodic
Table
For the 1987 Copyright of The Addison Wesley Textbook
2) List the three kinds of subatomic particles in an atom. What are the major characteristics
of these particles?
3) What is a cathode-ray tube? What role did this device play in the discovery of atomic
structure?
4) How many protons, neutrons and electrons are in the following:
a. Chlorine-37
b. Aluminum-27
c. Selenium -79
d. Carbon-14
e. Scandium-45 3+ ion
5) Define the term isotope. Explain how an element's atomic mass is related to the
abundances of its different isotopes.
