1.2 Radioactivity

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What is a alpha particle?
A 2+ positive helium nucleus
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What is a beta particle?
a fast moving electron
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What is a gamma ray?
its a high energy electromagnetic wave
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Why is alpha highly ionising?
they are large, and move relatively slow so release all their energy quickly
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How penetrating is alpha?
Least penetrating. Stopped by a thin sheet of paper or skin
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How penetrating is beta?
It can penetrate through paper and skin, yet is stopped by a thick sheet of aluminium
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How ionising is gamma?
Least ionising so can penetrate the furthest.
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How far can gamma penetrate?
It can penetrate through paper, skin and aluminium yet can only be stopped by thick lead, and a metre of concrete
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What effect does a electric field have on radiation?
Gamma rays are undeflected, alpha is deflected towards the negative plate, ad beta is undeflected towards the positive plate ( more than alpha as its lighter)
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Card 2

Front

What is a beta particle?

Back

a fast moving electron

Card 3

Front

What is a gamma ray?

Back

Preview of the front of card 3

Card 4

Front

Why is alpha highly ionising?

Back

Preview of the front of card 4

Card 5

Front

How penetrating is alpha?

Back

Preview of the front of card 5
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