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30 Cards in this Set
- Front
- Back
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What is an alpha particle? |
A particle made of 2 protons and 2 neutrons. The same as a helium nucleus. |
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What is an alpha particle’s mass? |
4 amu (atomic mass unit) |
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What is an alpha particle’s charge? |
+ |
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What is an alpha particle’s range in air? |
5 cm |
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In an alpha particle is penetrating power high or low? |
Very low. |
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What are alpha particles absorbed by? |
Paper or skin. |
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Do alpha particles have high, medium or low ionising strength? Why? |
High, due to their large mass. |
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Are alpha particles deflected by electric fields? |
Yes, due to their positive charge they are deflected- at small angles because of their large mass. |
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Are alpha particles deflected by magnetic fields? |
Yes, due to their positive charge they are deflected- at small angles because of their large mass. |
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What are some uses for alpha particles? |
-Smoke alarms -Deionise places where charge is a problem |
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What is a beta particle? |
A high speed electron emitted from the nucleus. |
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What is a beta particle’s mass? |
0.0005 amu (atomic mass unit) |
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What is a beta particle’s charge? |
- |
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What is a beta particle’s range in air? |
100cm |
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In a beta particle is penetrating power high or low? |
Medium. |
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Do beta particles have high, medium or low ionising strength? |
Low. |
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What are beta particles absorbed by? |
5mm of aluminium or 2mm lead. |
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Are beta particles deflected by electric fields? |
Yes, due to their negative charge they are deflected- at large angles because of their small mass. |
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Are beta particles deflected by magnetic fields? |
Yes, due to their negative charge they are deflected- at large angles because of their small mass. |
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What are some uses of beta particles? |
-Regulating thickness of paper or foil -Cancer treatment on or near surface of skin |
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What is a gamma ray? |
An electromagnetic wave. |
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What is a gamma ray’s mass? |
0 |
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What is a gamma ray’s charge? |
0 |
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What is a gamma ray’s range in air? |
Infinite. |
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In a gamma ray is penetrating power high or low? |
High. |
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What are gamma rays absorbed by? |
5cm of lead. |
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Are gamma rays deflected by electric fields? |
No, they do not have charge. |
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Are gamma rays deflected by magnetic fields? |
No, they do not have charge. |
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What are some uses of gamma rays? |
-Sterilising fruit -Sterilising medical equipment -Deep cancer treatment -Medical tracers |
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Do gamma rays have high, medium or low ionising strength? |
Low. |
