A) \[Na,K,Rb,Cs\]
B) \[Li,Be,B,C\]
C) \[Fe,Co,Ni,Cu~\]
D) \[F,Cl,Br,I\]
Correct Answer: C
Solution :
d-block | ||||
Period | \[VIII\] | \[VIII\] | \[VIII\] | \[IB\] |
\[Fe\] | \[Co\] | \[Ni\] | \[Cu\] |
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