Radioactivity

Question 1

Which best describes the results of Becquerel’s experiments?

Revolt · Accepted Answer

C: Both formed images when placed in their respective places.

Question 2

Carbon-14 is the typical radioisotope used to date materials; however, it has a limitation to 40,000 years. A scientist who wants to date materials older than 40,000 years would most likely use which radioisotope?

Revolt · Accepted Answer

A: uranium-238

Question 3

What was the commonality between Becquerel and the Curies in terms of their work?

Revolt · Accepted Answer

C: uranium

Question 4

Manganese-52 has a half-life of 6 days. How many days would a scientist have to wait for the radioactivity to be 12.5% the starting amount?

Revolt · Accepted Answer

C: 18

Question 5

Carbon-14 is used to determine the time an organism was living. The amount of carbon-14 an organism has is constant with the atmosphere, but when an organism dies the carbon-14 decays at a half-life of 5,730 years. If an archeologist measured the amount of carbon-14 in an organism and it was 25% of the total amount of atmospheric C-14, what is the age of the organism?

Revolt · Accepted Answer

C: 11,460 years

Question 6

Matt manages a company that monitors the wastes from a company that produces radioactive byproducts. Matt is most likely a(n)

Revolt · Accepted Answer

D: nuclear scientist.

Question 7

Juliet started working with a radioactive substance. In 1997, she started with 200 g. When she measured again in 2002, she had 100 g left. In 2007, she had 50 g.

Revolt · Accepted Answer

C: cobalt-60

Question 8

Which is one use for radioactive isotopes?

Revolt · Accepted Answer

D: archaeology

Question 9

Question 9

Revolt · Accepted Answer

A: rubidium-91

Question 10

Cameron is a doctor treating a cancer patient, Billy is an archeologist dating a vase, and Isabelle is a geologist dating a layer of soil. Which isotopes would each person most likely use?

Revolt · Accepted Answer

B: Cameron would use cobalt-60 (which releases gamma rays), Billy would use carbon-14, and Isabelle would use uranium-238.

Radioactivity Answers

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