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- 1. Multiple Choice
What is the half-life of iodine-131?32 days8 days16 days24 days - 2. Multiple Choice
The % of the parent isotope remaining after 1 Half Life.
50%
25%
12.5%
6.25%
- 3. Multiple Choice
The % of the parent isotope remaining after 2 Half Lives.
50%
25%
12.5%
6.25%
- 4. Multiple Choice
What is the Half life of this isotope?
5 seconds
10 seconds
15 seconds
20 seconds
- 5. Multiple Choice
What is the Half Life of this isotope?
3 days
5 days
8 days
10 days
- 6. Multiple ChoiceWhat is Half-life?The amount of time it takes for some of the nuclei in a sample of the isotope to decayThe amount of time it takes for half the electrons in a sample of the isotope to decayThe amount of time it takes for half the nuclei in a sample of the isotope to decaythe amount of time it takes to double the nuclei in a sample of the isotope to decay
- 7. Multiple ChoiceIf one-fourth of the carbon-14 is remaining then how many half-lives have passed?1234
- 8. Multiple Choice
Why do some elements have half-lives?
they radioactively decay
half of their atom gets stolen
They are Twizzlers that break in half
- 9. Multiple Choice
What is the only difference between two different isotopes of the same element?
Number of neutrons
Number of protons
Number of electrons
Size of atom
- 10. Multiple Choice
After the third half-life, how much of the sample is left?
1/2
1/3
1/16
1/8
- Answer choicesTagsAnswer choicesTags