Question

Please answer fast friends. .......its fill up only......1. the most reactive element in the halogen group is ???????? ( astetine, iodine, chlorine, fluorine) ......2. The halogen which is liquid at room temperature is? ??????????..........3. The metallic character of elements? ?????????? in a group from top to bottom. .............4. valency of elements ................ In a period from left to right.......

Answer 1

1.Florine
3.metallic character increases down the group
4.valency increases from left to right

Answer 2

1 iodine

2 bromine

3 astetine