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    Please help me understand these please?!!!

    I have tried very hard online, however the assignment is due tomorrow and I just cannot get my head around 1s, 2d....etc i don't understand how you are able to work them out about elements and ions.

    Cheers for any help in advance!
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    Orbitals fill in this order:
    1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p etc

    Each s orbital can hold 2 electrons, p orbitals can hold 4 electrons and d orbitals can hold 10 electrons

    E.g. Sulfur has 16 electrons so it's electron configuration would be:
    1s2, 2s2, 2p6, 3s2, 3p4
 
 
 
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