Question

Which of the following is true about the concept of half-life?

A. Half-life measures the rate of decay of a radioisotope.
B. The shorter the half-life, the more dangerous the radioisotope.
C. Half-life predicts which atoms in a radioactive sample will decay.

I think it`s A?

Answer 1

it is A Half-life measures the rate of decay of a radioisotope.

I took the test

Answer 2

Its A. because it measures the rate of the decay of the isotope