Question

An element has the electronic configuration $1s^2,2s^{2}2p^6,3s^{2}3p^2$. Its valency electrons are[NCERT 1973]

• A. 6
• B. 2
• C. 3
• D. 4

Answer 1

The correct option is D

4

An element has the electronic configuration $1s^2,2s^{2}2p^6,3s^{2}3p^2$ , (Si) . It's valency electrons are four.