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in Chemistry by (122k points)
Lanthanoids are placed in
A. `3^(rd)` group and `7^(th)` period
B. `3^(rd)` group and `6^(th)` period
C. `4^(th)` group and `7^(th)` period
D. `3^(rd)` group and `5^(th)` period

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1 Answer

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by (121k points)
Correct Answer - A::B::C::D

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