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Radiation And Half-Life
Test Description: Answer these questions on radiation and the few half-life problems.
Instructions: Answer all questions to get your test result.
1) What are the three types of radioactivity?
A
Alpha, Beta, Metal
B
Alpha, Gamma, Waves
C
Beta, Gamma, Lead
D
Alpha, Beta, Gamma
2) What is radiation?
A
Jumbling of electrons
B
The process of emitting energy in the form of waves or particles
C
The time it takes for half of the atoms of a radioactive substance to decay
D
None of the above
3) What can stop Alpha Particles?
A
A sheet of paper
B
None of the above answers
C
A piece of wood
D
The human body
4) What can stop Gamma Rays?
A
A thick piece of lead
B
Aluminum Shielding
C
Paper
D
The brick structure of the school
5) What is the mass and charge of Gamma Rays?
A
0 mass; 0 charge
B
Unknown numbers
C
0 mass; +3 charge
D
~0.5 mass; -1 charge
6) What are the mass and charges of Alpha and Beta particles?
A
Alpha- Unknown for both the mass and charge; Beta- Mass of 0, Charge of 0
B
Alpha- ~3752 g, Charge of +2; Beta- ~0.5 g, Charge of -1
C
Alpha- Mass of 0, Charge of 0; Beta- Mass of 0, Charge of 0
D
Alpha- Mass of ~3752 Charge of -1; Beta- Mass of ~4, Charge of -3
7) What is the half-life process?
A
The time it takes for half of an atom to decay
B
The time it takes for half the atoms of a radioactive substance to decay
C
There is no half-life process
D
Process of emitting energy in the form of waves or particles
8) Where does radiation come from?
A
Comes from radios
B
Produced when particles interact or decay
C
None of the above answers are correct
D
It does come from anywhere, it just is.
9) What is the percentage of a 200 g sample of Nitrogen-16 that decays to 12.5 g in 21.6 s?
A
100%
B
12.5%
C
25%
D
6.25%
10) Thallium-208 has a half-life of 3.053 min. How long does it take for 120 g to decay to 7.50?
A
48.84 min
B
6.106 min
C
21.12 min
D
12.21 min.
*select an answer for all questions
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