The meaning of radioactive substance and reason for describing the phenomenon by the term radioactive decay are to be interpreted. Concept Introduction: The radioactive substances are those substances which gives the particles from an unstable nucleus. The positively charged center of any atom is known as nucleus of that atom. It is composed of protons and neutrons.

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Chapter 20, Problem 7RQ

Interpretation Introduction

Interpretation:

The meaning of radioactive substance and reason for describing the phenomenon by the term radioactive decay are to be interpreted.

Concept Introduction:

The radioactive substances are those substances which gives the particles from an unstable nucleus.

The positively charged center of any atom is known as nucleus of that atom. It is composed of protons and neutrons.

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