Level 4

gamma radiation can be stopped by

• several feet of lead

• a piece of paper

• a piece of perspex

What is the most penetrating radiation?

• Gamma

• Beta

• Alpha

What is emitted during Alpha Radiation?

• A helium nuclei.

• positrons

The three types of nuclear radiation in increasing order of penetrating power are ____.

• alpha, beta, gamma

• gamma , beta , alpha

Alpha particles have a _____ charge.

• +2

• 0

• 1

What type of radiation can be stopped by a piece of paper?

• Alpha radiation

• Beta radiation

• Gamma radiation

What type of radiation can be stopped by a 5 mm piece of aluminium?

• Beta radiation

• Gamma radiation

• Alpha radiation