`Be^(2+)` is iso-electronic with

Options

A. `Mg^(2+)`
B. `Na^(+)`
C. `Li^(+)`
D. `H^(+)`

Answer

c

Explanation

Number of electrons in`Be^(2+)=4-2=2`
Number of electrons nin `Li^(+)=3-1=2`
Both `Be^(+) and Li^(+)` have same number of electrons.
So `Be^(+)`,`Li^(+)` from a isoelectronic pair.