Answer :
The electron configuration of an ion is determined by the number of electrons gained or lost by the atom.
The electron configuration of an ion is determined by the number of electrons gained or lost by the atom.
For (a) a carbon atom with a negative charge, it gains one electron, so the electron configuration becomes 1s2 2s2 2p6.
For (b) a carbon atom with a positive charge, it loses one electron, so the electron configuration becomes 1s2 2s2 2p5.
For (c) a nitrogen atom with a positive charge, it loses one electron, so the electron configuration becomes 1s2 2s2 2p4.
Finally, for (d) an oxygen atom with a negative charge, it gains one electron, so the electron configuration becomes 1s2 2s2 2p6.
It's important to note that ions have different electron configurations than their neutral atoms due to the change in the number of electrons.
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