# The general electronic configuration of outer most and penultimate shell is given as (n - 1)s^(2)(n-1)p^(6)(n-1)d^(x)ns^(2). Then for an element wit

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The general electronic configuration of outer most and penultimate shell is given as (n - 1)s^(2)(n-1)p^(6)(n-1)d^(x)ns^(2). Then for an element with n=4 und x = 7.
A. 25
B. 26
C. 27
D. 28

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Correct Answer - C