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12 Cards in this Set
- Front
- Back
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what does the nucleus contain? |
protons and neutrons |
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What particles are heavy and positively charged? |
protons |
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what particles are heavy and neutral? |
neutrons |
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what particles are tiny and negatively charged? |
electrons |
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number of protons = what? |
number of electrons |
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atoms aren't ........ in chemical reactions? |
lost or made |
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in a chemical reaction, what do the atoms do? |
they rearrange |
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some elements emit ...... when heated |
distinctive colours |
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electrons always what? |
occupy shells |
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ions are made when atoms ...... |
gain or loose electrons |
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which group are the alkali metals? |
group one |
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what is ionic bonding? |
oppositely charged ions being attracted to eachother and sticking together forming an 'ionic bond' |
