Arrange the following radiations in order of increasing ionization of air. I. Alpha Il. Gamma...
PHYSICS
WAEC 2022
Arrange the following radiations in order of increasing ionization of air.
I. Alpha
Il. Gamma
IIl. Beta
- A. I< III< II
- B. II< I< III
- C. II< III< I
- D. I< II
Correct Answer: C. II< III< I
Explanation
Alpha particles are highly ionising because of their double positive charge, large mass (compared to a beta particle) and because they are relatively slow. They can cause multiple ionisations within a very small distance. And the gamma radiation has the least ionising power.
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