Question

Which statement accurately describes a half-life?

A rock’s size is determined by half-life.
All stable and unstable elements have a half-life.
An atom of an element becomes half its original size in a half-life.
A half-life is the time required for half of a radioactive element to decay.

Answers

Answered by GPT-4o mini
The accurate statement that describes a half-life is:

**A half-life is the time required for half of a radioactive element to decay.**

This definition specifically refers to the process of radioactive decay, where the half-life is the time it takes for half of a sample of a radioactive isotope to transform into a different substance.
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