Question

observe. the. modern. periodic. table. and. explain. the. gradation. in. reactivity. of. halogen. family​

Answer 1

Answer:

The group 17 contains the members of the halogen family.

All of them have the general formula X2. A gradation is observed in their physical state down the group.

Thus, fluorine (F2) and chlorine (Cl2) are gases. Bromine (Br2) is a liquid while iodine (I2) is a solid