Question

halogens are placed in separate group in Modern Periodic Table 1 state their group number 2 how many valence electron does each have 3 what is the type of Ions formed by them 4 name any two halogens

Answer 1

1. 17
2.7
4.iodine,chlorine
3.anions

Answer 2

There group number is 17 or (VII A).

All of them have valency 1.

In reactions with metals the halogen atoms gain an electron to form ions with a 1− charge. The metal halide formed is an ionic compound. With non-metals, the halogens form covalently bonded molecules.

Halogens are

Flourine, Chlorine, Bromine and Iodine.