Question

hey... easy ques..... but ans needed
Which ion has pseudo inert gas configuration
Cu^+
Fe^2+
O^2-
Cu^2+


No cheating.. Only ans with explanation neeeded ​

Answer 1

O2-

Explanation:

because oxygen has 8 electrons in total . and have 6 electrons in valence shell . it need two more electrons to get enert gas configuration.so it does it like O 2 -

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