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Be^(2+) is isoelectronic with which of ...

`Be^(2+)` is isoelectronic with which of the following ions -

A

`Na^(+)`

B

`Mg^(2+)`

C

`H^(+)`

D

`Li^(+)`

Text Solution

Verified by Experts

The correct Answer is:
D
No. of electrons in Be = 4
`:.` No, of eelctrons in `Be^(2+) = 2`
Again, no. of electrons in Li = 3
`:.` No. of electrons in `Li^(+) = 2`
Therefore, `Be^(2+)` is isoelectronic with `Li^(+)`.
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