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Question
Q339) If the atomic number of nickel and copper are 28 and 29 respectively, which of the following does the electric configuration 1s
2
2s
2
2p
6
3s
2
3p
6
3d
10
represent
[ Pb. CET 1988]
a)Cu
+
b) Cu
2+
c)Ni
2+
d)Ni
SOLUTION
Answer:(a)