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24 Cards in this Set
- Front
- Back
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Which ionising radiation is stopped by paper/skin? |
Alpha radiation |
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Which ionising radiation is stopped by a few millimeters of aluminium? |
Beta radiation |
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Which ionising radiation is mostly stopped by a few centimeters of lead? |
Gamma radiation |
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An alpha particle has what charge? |
+2 |
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A beta particle has what charge? |
-1 |
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How is a positive ion formed? |
When atoms lose electrons. |
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When an atom gains electrons, an ion is formed. What charge will it have? |
Negative |
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Each atom is neutral because... |
Every Proton there is an Electron which means... |
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To make an atom postively charged... |
You take away Electrons... |
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An isotope has... |
extra neutrons |
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Atomic number (for an atom) is equual to |
the number of protons or electrons |
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Atomic mass is equal to... |
the number of protons and neutrons |
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Which particle is neutrally charged |
Neutron |
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Half-life is |
the time is take for half of the atoms to decay |
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In an electric field the alpha particles are attracted towards the... |
negative plate |
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In an electric field the beta particles are attracted towards the... |
positive plate |
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How many protons and neutrons does alpha radiation have? |
2 protons and 2 neutrons |
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Where is beta radiation released from? |
Inside the nucleus |
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Gamma radiation is a wave that has... |
No mass |
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Gamma radiation carries... |
A huge amount of energy |
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What can ionising radiations do to living cells? |
Damage them which can result in them dying or becoming cancerous. |
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What radioactive substances does radiation come from? |
The ground, air, building materials and food. |
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All animals emit... |
natural levels of radiation |
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What can high doses of ionising radiation do? |
Kill cancerous cells |
