Academic Chemistry Nuclear Chemistry Review Worksheet With Answers Page 3
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66. Look at the diagram below. Below each material indicate with a checkmark which
type of radiation-alpha, beta, or gamma-can be stopped by each material.
Lead block
Paper
Radioactive
source
Wood
Lead or concrete
[~-~ alpha
~-’-~ alpha
[~alpha
[---]beta
[~beta
[~beta
~-] gamma
~--~ gamma
[~gamma
7. The decay below shows how a radioactive form of potassium found in many
minerals decays into argon. Fill in the missing mass and atomic numbers.
0
+
> Ar
v ~
8. Use the following labels tOi complete the diagram below: fission, unstable nucleus,
neutrons/chain reaction.
235 II
92 "
Uranium-235
(fissionable)
236 II
92 ~’
Uranium-236
(very unstable)
142 ~
56 ~"
Barium-142
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