23its not Li,its Li+
but i thgt answer is Na+ > Mg+2 > Li + > Be+2
isn't it ???
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3 Answers
1Answer is the 2nd option
This is because from moving left to right in a period, the ionic radius decreases due to increase in the effective nuclear charge, as an additional electron is added to the same shell as but as moving from down to bottom,atomic radii increases due to additional of new shell.
Also Li+ & Mg(2+) are diagonally related.
