Question

the number of valence electrons present in an atom if it forms an ion with 2- charge​

Answer 1

║Answer║

The no. of valence electrons present in an atom if it forms an ion with  (-2) charge = 6 + 2 = 8

║Explanation║

• For example, oxygen (O) has 6 valence electrons.

• Oxygen ion ($O^{2-}$)  has valence electrons 6 + 2 = 8 electrons.
• Due to negative charge, the ions are added to the no. of electrons.

⇄  hope it helps you ⇆

Answer 2

The no. of valence electrons present in an atom if it forms an ion with (-2) charge = 6 + 2 = 8