Chapter 25.1, Problem 3LC

Interpretation Introduction

Interpretation: To identify the part of an atom that changes radioactive decay.

Concept Introduction: The process which involves the formation of more than one nuclide via a collision between two nuclei or between one nucleus and a subatomic particle, is known as a nuclear reaction.

Answer to Problem 3LC

During radioactive decay, the part of an atom that changes is the nucleus.

Explanation of Solution

During radioactive decay, the part of an atom that changes is the nucleus. Thus, radioactive decay can sometimes be referred to as nuclear decay.

Mainly, this change occurs in alpha and beta decay which are disused as follows:

• Alpha decay: The radiation that emits an alpha particle (Helium nuclei) is known as alpha radiation. An alpha particle comprises two protons and two neutrons and also consists of a double positive layer.
• Beta decay: When an electron is formed that results from breaking a neutron, this electron is termed a beta particle. The neutron breaks into a proton and an electron is released in the beta radiation.

Conclusion

During radioactive decay, the part of an atom that changes is the nucleus.