The half-life of carbon-14 is 5730 years. If we start with 10 grams of carbon-14, after 5730 years, we will have _____ of carbon-14 left. A. 1 gram B. 2.5 grams C. 5 grams D. zero grams
The answer is C. 5 grams. The half-life means that the time costs when half of the substances decay. So after the half-life, there will be only half carbon-14 left.
