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Q.

Number of valence electrons in Na+ ion are

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a

11

b

8

c

0

d

10

answer is C.

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Detailed Solution

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Number of valence electrons in Na+ ion is 8.
Sodium has an atomic number of 11. Ten electrons are needed to create a sodium ion since sodium loses an electron. There are only 10 electrons in the Na+ ion. The electronic configuration of Na+ is 2, 8. Therefore, the  sodium ion has 8 valence electrons.
 

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