Chapter 11.4, Problem 2QQ

Interpretation Introduction

Interpretation:

After three half-lives, the amount of not decayed sample of the radioactive sample has to be chosen from the given options.

Concept Introduction:

Radioactive nuclides undergo disintegration by emission of radiation.  All the radioactive nuclide do not undergo the decay at a same rate.  Some decay rapidly and others decay very slowly.  The nuclear stability can be quantitatively expressed by using the half-life.

The time required for half quantity of the radioactive substance to undergo decay is known as half-life.  It is represented as $t_{1/2}$.