Test Chapter 4 Name______Hr_____

List the protons, neutrons and electrons of the following atoms:

120 56 25 +2 36 -1

51 Sb 26Fe 12Mg 17Cl

P P P P

N N N N

E E E E

Find the missing part to the reaction:

1. 23892U ----> 23490Th +

2. 22086Rn ----> + 42He

3. 23491Pa -----> 23492U +

4. -----> 23992U + 0-1e

5. 23993Np ----> + 0-1e

Radiation Symbol Can be stopped by

Alpha

Beta

Gamma

Find the Average Atomic Mass of the following elements:

Example #1: Stadium

mass number / percent abundance
23 / 73
25 / 27

Example #2: Mayonium

mass number / percent abundance
87 / 68
88 / 21.5
89 / 10.5

Matching:

A.  Rutherford B. Aristotle C. Dalton. D Democritus E. Thompson

1______First to theorize the atom

2______believed in earth fire air and water

3______brought back the theory of the atom

4______theorized the plum pudding model

5______preformed the gold foil experiment

Draw a picture of your favorite atom below: