Select one answer for each! 1.When a beta minus decay occurs in an unstable nucl

ID: 1303309 • Letter: S

Question

Select one answer for each!

1.When a beta minus decay occurs in an unstable nucleus, what happens to the atomic number of the nucleus?

2.What fraction of the original sample will have decayed after 3 days?

3.The Earth is several billion years old, so why do we still find radon on this planet?

4. After three half-lives, what fraction of the original radioactive material is left?

5.A material having which decay constant would have the shortest half-life?

The atomic number increases by 2. The atomic number decreases by 2. The atomic number decreases by 1. The atomic number increases by 1. The atomic number remains constant.

Explanation / Answer

1. The atomic number increases by 1.

All of it.

3. Heavier unstable isotopes decay into it.

4. 78

5. 10 power 9 /day

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Select one answer for each! 1.When a beta minus decay occurs in an unstable nucl

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