# Question #0ff3e

##### 1 Answer

Sep 28, 2016

#### Explanation:

A radioactive isotope's **nuclear half-life** tells you how much time must pass in order for **half** of the atoms present in a sample to undergo *radioactive decay*.

In your case, you start with

This is, of course, equivalent to saying that **days** for half of the sample to undergo radioactive decay, you can say that this radioactive isotope has a half-life of **days**.