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Question

Which of the following has pseudo inert gas configuration?

A
Na+
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B
Cu+
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C
K+
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D
S2
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Solution

The correct option is B Cu+
An element with pseudo noble gas configuration has 18 electrons in the outermost shell instead of 8.
Na+1s22s22p6 ( inert gas configuration).
Cu+1s22s22p63s23p63d10 ( pseudo inert gas configuration).
K+1s22s22p63s23p6 (inert gas configuration).
S21s22s22p63s23p6 (inert gas configuration).

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