Question

Which amongst the following can lose 2 electrons to acquire the configuration of argon?

• A. $N$
• B. $Mg$
• C. $Ca$
• D. $Be$

Answer 1

The correct option is C $Ca$

Since calcium has electronic configuration 2,8,8,2 in order to achieve stable noble gas configuration like nearest noble gas i.e. argon calcium has to donate its two valence electron.