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Simple molecular and giant lattice structures question

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    Hello, I am a bit confused with the structures of elements and identifying them. How do I know if an element has a simple molecular structure or a giant lattice structure??? I know that sulfur's got a simple molecular formula, but carbon's got a giant lattice structure. Hence sulfur has a lower melting point than carbon.

    Thanks a lot
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    Giant lattice is the same as giant ionic isn't it? Ionic/lattice is with metals bonded to non-metals like NaCl.
    Covalent's between non-metals and non-metals. I think only Carbon and Silicon do giant molecular (for AS levels anyway), otherwise it will be simple molecular.

    Hope that's right!
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    (Original post by jellybean1234)
    Giant lattice is the same as giant ionic isn't it? Ionic/lattice is with metals bonded to non-metals like NaCl.
    Covalent's between non-metals and non-metals. I think only Carbon and Silicon do giant molecular (for AS levels anyway), otherwise it will be simple molecular.

    Hope that's right!
    elements cannot form ionic lattices
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    (Original post by krisshP)
    Hello, I am a bit confused with the structures of elements and identifying them. How do I know if an element has a simple molecular structure or a giant lattice structure??? I know that sulfur's got a simple molecular formula, but carbon's got a giant lattice structure. Hence sulfur has a lower melting point than carbon.

    Thanks a lot
    You just gotta learn them ...

    B, C, Si Giant covalent (although carbon also forms fullerenes)
    Metals = metallic
    non-metals = simple molecular
    noble gases = atomic
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    (Original post by charco)
    elements cannot form ionic lattices
    They can can't they?
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    (Original post by jellybean1234)
    They can can't they?
    No, only compounds can have ionic lattices
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    (Original post by charco)
    No, only compounds can have ionic lattices
    Non metals bonded to metals like NaCl are giant ionic lattices, no?
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    (Original post by jellybean1234)
    Non metals bonded to metals like NaCl are giant ionic lattices, no?
    yes, and they're called compounds.
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    Well that's what I was saying in the first place.
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    (Original post by charco)
    You just gotta learn them ...

    B, C, Si Giant covalent (although carbon also forms fullerenes)
    Metals = metallic
    non-metals = simple molecular
    noble gases = atomic
    thanks a lor this short and excellent answer!

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Updated: December 14, 2012
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