The electronic configuration of Chlorine anion with a charge of -1 is 1s² 2s² 2p⁶ 3s² 3p⁶
The chlorine anion with a charge of -1 means that one electron has been
accepted by the atom thereby becoming an anion with a charge of -1 . The
electron accepted changes the electron configuration of a neutral chlorine atom (1s² 2s² 2p⁶ 3s² 3p⁵)
One electron accepted then makes the electronic configuration to become
1s² 2s² 2p⁶ 3s² 3p⁶.
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