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The element with atomic number 56 belong...

The element with atomic number `56` belongs to which block ?

A

`s`

B

`p`

C

`d`

D

`f`

Text Solution

Verified by Experts

The correct Answer is:
A
It takes `54` electrons `(2 + 8+ 8 +18 +18)` to complete the fifth period. Therefore, the element with atomic number `56` has electron configuration `[Xe] 6s^(2)`.
Since the last electron enters the `s` subshell of the last shell, it belongs to the `s` block.
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