Chapter 4.4, Problem 25SSC

Interpretation Introduction

Interpretation:

The stability gained by an unstable atoms needs to be explained.

Concept introduction:

Atom is the smallest particle in the element that can neither be created nor destroyed. It consists of protons, neutrons and electrons.

Answer to Problem 25SSC

Unstable atoms undergo a series of radioactive decay until they become a stable element.

Explanation of Solution

An atom is unstable if the nucleus has excess of energy due to the presence of excess neutrons or protons. These are also radioactive atoms. Radioactive atoms emit radiation because their nuclei are unstable.

Unstable nuclei lose their energy in a spontaneous process by emission of radiation. This process is known as radioactive decay. Unstable atoms undergo radioactive decay until a stable atoms, possibly of a different element is formed.

Conclusion

Hence, an unstable atom becomes stable by undergoing radioactive decay until it becomes an element.