The electronic configuration of an atom is $2, 8, 3$ . The number of valence electrons in the atom is:

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Solution

The correct option is C
3

Explanation for correct option:
Option C: $3$ :
The electrons present in the outermost shell i.e. valence shell of an atom are known as valence electrons.
The electronic configuration of an atom is $(2, 8, 3)$ .
The number of electrons in the outermost shell are $3$ .
Thus, the number of valence electrons in the atom are $3$ .
Thus, Option (C) is the correct option.

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The electronic configuration of an atom is 2,8,3. The number of valence electrons in the atom is:

The electronic configuration of an atom is $2, 8, 3$ . The number of valence electrons in the atom is: