We have to **determine the probability of decay** of a certain element A **between certain time intervals** using the given graph.

**Radioactive decay** is a process whereby an unstable nucleus undergoes breakdown to form relatively stable nuclei.

The time that it takes for half of a radioactive substance to decay is called the **half-life**.

We will start by **labelling the given graph** so that it is easier to read and extract values from it.

The curve to the right shows the radioactive decay of a particular sample of a nucleus called Element A. A particular nucleus survives for the first five hours, what's the probability that particular nucleus of Element A will decal between hours 5 and 10? What is the probability that particular nucleus of element A will decay between 5 and 20 hours?

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the First Order Half Life concept. You can view video lessons to learn First Order Half Life. Or if you need more First Order Half Life practice, you can also practice First Order Half Life practice problems.