Radiation And Half-Life Question Preview (ID: 18509)


Answer These Questions On Radiation And The Few Half-life Problems. TEACHERS: click here for quick copy question ID numbers.

What is the percentage of a 200 g sample of Nitrogen-16 that decays to 12.5 g in 21.6 s?
a) 12.5%
b) 6.25%
c) 100%
d) 25%

Where does radiation come from?
a) It does come from anywhere, it just is.
b) Produced when particles interact or decay
c) Comes from radios
d) None of the above answers are correct

What is the half-life process?
a) Process of emitting energy in the form of waves or particles
b) There is no half-life process
c) The time it takes for half of an atom to decay
d) The time it takes for half the atoms of a radioactive substance to decay

What are the mass and charges of Alpha and Beta particles?
a) Alpha- Mass of ~3752 Charge of -1; Beta- Mass of ~4, Charge of -3
b) Alpha- Unknown for both the mass and charge; Beta- Mass of 0, Charge of 0
c) Alpha- Mass of 0, Charge of 0; Beta- Mass of 0, Charge of 0
d) Alpha- ~3752 g, Charge of +2; Beta- ~0.5 g, Charge of -1

What can stop Gamma Rays?
a) Aluminum Shielding
b) The brick structure of the school
c) Paper
d) A thick piece of lead

What is the mass and charge of Gamma Rays?
a) ~0.5 mass; -1 charge
b) 0 mass; 0 charge
c) 0 mass; +3 charge
d) Unknown numbers

What can stop Alpha Particles?
a) A sheet of paper
b) The human body
c) A piece of wood
d) None of the above answers

What is radiation?
a) The time it takes for half of the atoms of a radioactive substance to decay
b) Jumbling of electrons
c) The process of emitting energy in the form of waves or particles
d) None of the above

What are the three types of radioactivity?
a) Alpha, Beta, Metal
b) Alpha, Beta, Gamma
c) Beta, Gamma, Lead
d) Alpha, Gamma, Waves

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) 21.12 min
c) 6.106 min
d) 12.21 min.

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