General electronic configuration of outermost and penultimate shell is \( (n-1) s^{2}(n-1) p^{6}...

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General electronic configuration of outermost and penultimate shell is \( (n-1) s^{2}(n-1) p^{6}(n-1) d^{x} n s^{2} \). If \( n=4 \) and \( x=5 \), then the number of protons in the nucleus will be:
(a) \( 25 \)
(b) \( 24 \)
(c) 25
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