Write the electronic configuration of the following:
a) Na+
b) O^2-
c) F^-

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Solution

Electronic configuration of

(i) Na⁺ = 1s² 2s² 2p⁶

(ii) O^2- = 1s² 2s² 2p⁶

(iii) F^- = 1s² 2s² 2p⁶

Since, all of these ions have same number of electrons (i.e. 10), so these species are isoelectronic.

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