Arrange the following radiations in order of increasing ionization of air.

I. Alpha

Il. Gamma

IIl. Beta

  • A Alpha
  • B I < III < II
  • C II < I < III
  • D II < III < I
  • E I < II
waec 2022physics

The correct answer is C. II < I < III

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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