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Question

Match the following.
A)3d 1) Sc[21] to Zn(30)
B)4d 2) La(57),Hf(72) to Hg(80)
C)5d 3) Ce(58) to Lr(103)
D) 6d 4) Y(39) to Cd(48)
5) Ac(89), Rf(104) to Cn(112)

A
A5,B4,C2,D3
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B
A1,B4,C2,D5
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C
A1,B4,C3,D5
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D
A2,B5,C1,D4
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Solution

The correct option is B A1,B4,C2,D5
the first element of each transition series are as follows:
series first element and its atomic no. last element and its atomicno.
3d Sc(21) Zn(30)
4d Y(39) Cd(48)
5d La(57) Hg(66)
6d Ac(93) Mt(109).

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