Section 7: Radioactivity and particles

Is divided into three main topics

a) Units
b) Radioactivity
c) Particles

The whole section is divided into 20 subsections as 7.1-7.20

a) Units

7.1 In this section you need to rote learn following terms and their units



Number of atoms of an unstable element decay per second.

Becquerel (Bq)

2 Half-life Time taken for half of the nuclei of a sample to decay. Per second,per minute,per hour or per year
3 Time Second,minute,hour and year
4 Distance Centimeters (cm)