what-is-the-definition-of-a-radioactive-half-life

Question

What is the definition of a radioactive half-life?

Accepted Answer

The time required for half of a radioisotope to decay.

Answer

The time required for a radioisotope to double in mass.

Answer

The time required for a radioisotope to emit all its radiation.

Answer

The time required for a radioisotope to completely decay.