Tritium is a radioactive isotope of hydrogen with a half-life of 12 years.
A sample of gas contains 16.0 g of tritium.
What mass of tritium will remain in the sample after 24 years?
2.0 g2.0\text{ g}2.0 g
4.0 g4.0\text{ g}4.0 g
8.0 g8.0\text{ g}8.0 g
12.0 g12.0\text{ g}12.0 g
