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Question

An element has the electronic configuration 1s2,2s2 2p6,3s2 3p2. Its valency electrons are


A

6

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B

2

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C

3

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D

4

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Solution

The correct option is D

4


An element has the electronic configuration 1s2,2s2 2p6,3s2 3p2 , (Si) . It's valency electrons are four.


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