The outermost energy level of any halogen contains .................. electrons.

................ is considered from halogens.

Halogens are considered from ............... block.

All these halogens exist in gaseous state except ....................

The halogen which exists in a liquid state is ........................

The molecule of halogen is composed of .................. atom(s).

................... in its salt solutions.

The elements which can't replace bromine in its salt solution is (are) .............

The halogen, which can be prepared artificially is ..................

Bromine is obtained when chlorine reacts with ........... solution.