Half-Life

Front

What is the half-life of iodine-131?

Back

8 days

Front

The % of the parent isotope remaining after 1 Half Life.

Back

50%

Front

The % of the parent isotope remaining after 2 Half Lives.

Back

25%

Front

What is the Half life of this isotope? Options: 5 seconds, 10 seconds, 15 seconds, 20 seconds

Back

10 seconds

Front

What is the Half Life of this isotope? Options: 3 days, 5 days, 8 days, 10 days

Back

3 days

Front

Half-life

Back

The amount of time it takes for half the nuclei in a sample of the isotope to decay

Front

If one-fourth of the carbon-14 is remaining, how many half-lives have passed?

Back

2

Front

Why do some elements have half-lives?

Back

they radioactively decay

Front

What is the only difference between two different isotopes of the same element? Options: Number of neutrons, Number of protons, Number of electrons, Size of atom

Back

Number of neutrons

Front

After the third half-life, how much of the sample is left?

Back

1/8