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


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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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