I'll do 16. 16 is S. So we have 16 electrons.
16S.......1s2 2s2 2p6 3s2 3p4, Ground state.
16S^2-...1s2 2s2 2p6 3s2 3p6. S^2- with 18 electrons.
If you don't know the electron configuration for an element I refer you to www.webelements.com That site has electron configurations for all of the elements in the periodic table.
Show your work if you have other questions.
write the ground and ionic electronic configuration of the following atomic numbers ; 16,49,35,48, 39?
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