Question

# From the reaction given below deduce the group of  polonium in the periodic table (Pb belongs to group 14).$$_{84}Po^{210}\, \rightarrow\, _{82}Pb^{206}\, +\, _2He^4$$

A
2
B
14
C
6
D
16

Solution

## The correct option is D 16Fajan, Russel and Soddy (1913) gave group displacement law which states that on the emission of an $\alpha$-particle the new element lies two columns left in the periodic table and mass number decreases by 4 units. Since, $$Pb$$ belongs to group 14, $$Po$$ must belong to group 16.ChemistryNCERTStandard XII

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