Question

The number of electrons present in the valence shell of a halogen is -------------------

Answer 1

Halogens

• It belongs to the 17^th group of the periodic table.
• Group number depends on the number of valence electrons.
• For groups 1 and 2, the valence electron is the group number.
• For groups 13 to 18, add 10 to the valence electrons to get the group number
• Hence halogens have 7 valence shell electrons.