Atomic Structure Question 212
Question: An element has the electronic configuration $ 1s^{2},2s^{2}2p^{6},3s^{2}3p^{2} $ . Its valency electrons are [NCERT 1973]
Options:
A) 6
B) 2
C) 3
D) 4
Show Answer
Answer:
Correct Answer: D
Solution:
An element has the electronic configuration $ 1s^{2},,2s^{2},2p^{6},3s^{2},3p^{2},,(Si) $ . It-s valency electrons are four.
