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Question

Question: An element has the electronic configuration\(1s^{2},2s^{2}2p^{6},3s^{2}3p^{2}\). Its valency electro...

An element has the electronic configuration1s2,2s22p6,3s23p21s^{2},2s^{2}2p^{6},3s^{2}3p^{2}. Its valency electrons are

A

6

B

2

C

3

D

4

Answer

4

Explanation

Solution

An element has the electronic configuration

1s2,2s22p6,3s23p2,(Si)1s^{2},2s^{2}2p^{6},3s^{2}3p^{2},(Si). Its valency electrons are four.