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Following are the valence shelI electron...

Following are the valence shelI electronic configurations of some elements.
Find out the blocks to which they belong in the periodic table?

A

`3s^(2) 3p^(5)`

B

`3d^(10) 4s^(2)`

C

`2s^(2)3p^(6) 4s^(1)`

D

`1s^(2) 2s^(2)`

Text Solution

Verified by Experts

The correct Answer is:
B, C, D
The block of the elements depend on the type of sub-shell which receive the last electron. In case of (i) it enters in `3p`-subsheel, (ii) it enters `3d`-subshell, (iii) it enters `4s`-subshell and (iv) it enters `2s`-subshell.
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