Question

“Maximum valence of second period element is four” explain.​

Answer 1

Explanation:

In the second period, we have 2s and 2p orbitals, which can accomodate a maximum of (2+6)=8 electrons. Hence, maximum number of valence electrons is 8.

Answer 2

In the second period, we have 2s and 2p orbitals, which can accommodate a maximum of (2+6)=8 electrons.
The second elements of periodic table lacks the d orbits. So maximum valence of second period element is four.