Basic Science JSS3 Third term

Sub-theme: You and energy

Theme: Science and development

WEEK 1

Radioactivity I

Performance Objectives

The student should be able to:

1. Define Radioactivity
2. Name some Radioactive elements

Content

Radioactivity

Everything on Earth is made of atoms, but you can see that not everything on Earth is the same. This is because everything is made of different types of atoms called elements. Atoms are really, really small, but each atom of an element is made of even smaller subatomic particles. These are the protons, neutrons, and electrons of the atom.

The nuclei of some certain elements are not stable, hence they disintegrate and simultaneously emit certain kinds of radiation, and in the process, change into the nuclei of other elements. This phenomenon is known as radioactivity.

Radioactivity is the spontaneous disintegration of.... View More