Question

Number of valence electrons in ${\mathrm{Na}}_{}^{+}$ion are :

• A. 11
• B. 10
• C. 8
• D. Zero

Answer 1

The correct option is C

8

The explanation for the correct answer

Option B

Several valence electrons in the ${\mathrm{Na}}_{}^{+}$ion are 10.

• Electrons present in the outermost shell of an atom of an element are called valence electrons.
• Sometimes atom will gain or lose electrons.
• If an atom loses one electron, it gains a positive charge.
• If an atom gains one electron, it gains a negative charge.
• Atomic number of element Sodium ($\mathrm{Na}$) = 11
• Electronic configuration = 2,8,1
• Valence electron of Sodium = 1
• When Sodium loses one electron, it will form (${\mathrm{Na}}^{+}$) ion.
• Electronic configuration of ${\mathrm{Na}}^{+}$= 2,8
• Valence electron of ${\mathrm{Na}}^{+}$ = 8

Conclusion: Hence Option C is correct.