All of the following electronic configurations are correct except
a) 20Ca [Ar]4s2
b) 25Mn [Ar] 3d54s2
c) 29Cu [Ar] 3d104s1
d) 50Sn [Kr]4d105s25p2
e) 86Rn [Xe]5d106s26p6
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Our tutors rated the difficulty ofAll of the following electronic configurations are correct ...as medium difficulty.
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