a) H: 1s1
b) 16 S2-: 1s2 2s2 2p6 3s2 3p6
c) 20 Ca2+: 1s2 2s2 2p6 3s2 3p6
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a) H: 1s1
b) 16 S2-: 1s2 2s2 2p6 3s2 3p6
c) 20 Ca2+: 1s2 2s2 2p6 3s2 3p6