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Which of the following sets of atomic nu...

Which of the following sets of atomic numbers belongs to that of alkali metals?

A

`1, 12, 30,4, 62`

B

`37,19,3,55`

C

`9,17,35,53`

D

`12,20,56,88`

Text Solution

Verified by Experts

The correct Answer is:
B
The atomic numbers of alkali metals are
`L(3) +8 = Na (11)`
`{:(Li(3)+8=Na(11),,,Rb(37)+18=Cs(55),),(K(19)+18=Rb(37),,,Cs(55)+32=Fr(87),):}`
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