Chapter 20, Problem 22E

Interpretation Introduction

Interpretation:

The mass of chromium $-51$ left in a sample after $55.4$ days is to be stated.

Concept introduction:

The elements whose nucleus decays spontaneously are known as radioactive elements. The decay is accompanied by the emission of alpha particles, beta particles, and gamma rays. All the elements which have an atomic number greater than $83$ are radioactive. The half life of a radioactive substance is defined as the time taken by half of its atoms to decay.