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1 October, 16:18

Name the following covalent compound:

S5N9

pentasulfur nonanitride

hexsulfur decanitride

pentasulfur decantride

tetrasulfur nonanitride

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  1. 1 October, 18:01
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    Pentasulfur nonanitride.

    Explanation:

    In order to name a compound properly, we need to identify the type of a compound we have. The given compound consists of two non-metals, sulfur and nitrogen. This implies that we have a covalent compound in contrast to an ionic compound which consists of a metal and a non-metal.

    To name a molecular/covalent compound, we should use prefixes stating the number of atoms we have. In this case, we have 5 sulfur atoms. The prefix for 5 is 'penta'. That said, we have 'pentasulfur' as our beginning of the name.

    We also have 9 nitrogen atoms. The second atom in the molecular formula would have an ending of '-ide', so we expect to have 'nitride'. Adding a prefix for 9, we'd have 'nonanitride'.

    Putting everything together, the name is pentasulfur nonanitride.

    Some common prefixes:

    mono - one (we don't state mono for the first atom, e. g., we would name CO as carbon monoxide instead of monocarbon monoxide);

    di - two;

    tri - three;

    tetra - four;

    penta - five;

    hexa - six;

    hepta - seven;

    octa - eight;

    nona - nine;

    deca - ten.

    Notice that 'decanitride' would be correct in case you had 10 nitrogen atoms, similarly, tetra and hexa stand for 4 and 6 instead of 5 given sulfur atoms.
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