chemistry

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What group is an element in if it has 5 electrons in the outer shell?
group 5
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What is a compound?
where two or more atoms are chemically combined.
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What 3 things can happen when a chemical reaction occurs with electrons?
either given, taken or shared.
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what happens if an atom loses an electron?
it becomes a positive ion.
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what happens if an atom gains an electron?
it becomes a negative ion.
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What do group 1 metals (alkali metas) react with and what do they form?
react with non metals to form an ion with a positive charge.
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What do group 7 non metals (halogens) react with and what do they form?
react with alkali metals to form an ion ith a negative charge.
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What happens when atoms share pairs of electrons?
they form strong covalent bonds.
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can you name 2 giant covalent structures and their propeties?
graphite- conductor, opaque, soft de-localised bonds. diamond-tightly held bonds, insulator, hard, transparrent.
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What steucture would you expect in a giant structure of metals?
they would be arranged in a regular pattern.
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What are the electrons in the highest occupied energy levels in a metal?
they are delocalised, therefore they can move freely through the whole structure.
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Other cards in this set

Card 2

Front

What is a compound?

Back

where two or more atoms are chemically combined.

Card 3

Front

What 3 things can happen when a chemical reaction occurs with electrons?

Back

Preview of the front of card 3

Card 4

Front

what happens if an atom loses an electron?

Back

Preview of the front of card 4

Card 5

Front

what happens if an atom gains an electron?

Back

Preview of the front of card 5
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