A) \[_{20}S{{c}^{42}}\]
B) \[_{21}C{{a}^{42}}\]
C) \[C{{s}^{+}}\]
D) \[{{K}^{+}}\]
Correct Answer: C
Solution :
Outer electronic configuration of transition elements is \[15\Omega \]In [c] 3rf-orbital is incomplete.
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