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11 Cards in this Set
- Front
- Back
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What is an ion? |
A charged particle formed when an atom gains or loses electrons |
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What is a molecular ion? |
A charged particle containing more than one atom |
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What is a cation? |
A positive ion |
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What is an anion? |
A negative ion |
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Explain ionic bonding |
Between metal and non-metal, typical of metal compounds. Transfer electrons to gain a full outer shell. Held together by strong electrostatic forces of attraction (strong because opposites attract), lots of energy required to break bonds. |
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Explain covalent bonding |
Between non-metal atoms. Share pairs of electrons to gain a full outer electron shell. Strong bonds, lots of energy required to break |
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What are simple covalent substances? |
Diatomic molecules with weak forces of attraction between molecules. |
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Properties of simple covalent substances |
Low melting and boiling points, don't conduct electricity because there are no charged electrons. |
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Define molecule |
2 or more atoms covalently bonded |
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Define diatomic |
2 or more atoms covalently bonded together in a molecule |
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Explain metallic bonding |
Occurs in elements, attraction between the closely-packed positive metal ion and the sea of delocalised negative electrons |
