Radioactivity — Quiz

Question 1

Which best describes the results of Becquerel’s experiments?

Revolt · Accepted Answer

Both formed images when placed in their respective places.

Question 2

The Curies took pure uranium and a uranium-containing substance. When they measured the amount of radioactivity, there was more in the uranium-containing substance than the pure uranium. Which idea did the Curies most likely develop?

Revolt · Accepted Answer

There are more radioactive substances than uranium.

Question 3

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

Revolt · Accepted Answer

uranium

Question 4

Which is one use for radioactive isotopes?

Revolt · Accepted Answer

archaeology

Question 5

The starting amount of radioactive iodine- 131 was 250 g The half-life is 8 days. When Leslie measured the amount, she measured 15 point 6 2 5 g of radioactive iodine. How many days have elapsed between measurements?

Revolt · Accepted Answer

32

Question 6

Elemental carbon has 6 protons and 6 neutrons. This is often described as carbon-12. Carbon-13 has 6 protons and 7 neutrons, while carbon-14 has 6 protons and 8 neutrons. Based on the trend with carbon and the fact that plutonium has 94 protons, how many neutrons are in radioactive plutonium-244?

Revolt · Accepted Answer

150 neutrons

Question 7

Manganese- 52 has a half-life of 6 days. How many days would a scientist have to wait for the radioactivity to be 12 point 5 percent the starting amount?

Revolt · Accepted Answer

18

Question 8

Which describes the experiments of Becquerel and the Curies?

Revolt · Accepted Answer

Becquerel showed that uranium gave off radioactivity, and the Curies discovered other radioactive elements.

Question 9

How can doctors best detect medical problems?

Revolt · Accepted Answer

by injecting a radioactive isotope that travels to the target tissue and measures the amount of radioactive decay

Radioactivity — Quiz Answers

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