13. The half life in radioactive decay is a. The time it takes for all of a radioactive isotope to decay b. The time it takes for ½ of a radioactive isotope to decay

Question

c.The number of nuclei that decay in 1 second.

d. The number of nuclei that remain after 1 second.

Answer 1

Answer is b. If you start with 100g of a substance, then after one half-life, you have 50g (statistically).