Question

Half of an isotope decays in 100 years. How long will it take for the second 1/2 life to pass?

Answer 1

200 years

Step-by-step explanation

Half-life (t1⁄2) is the time required for a quantity/substance to reduce to half of its initial value.

Since its first half life is 100 yearss, then for the second half life to pass, it will take 100 x 2 = 200 years