Which element is a halogen? argon bromine calcium lithium?

The halogens are five non-metallic elements found in group 17 of the periodic table. The term "halogen" means "salt-former" and compounds containing halogens are called "salts". All halogens have 7 electrons in their outer shells, giving them an oxidation number of -1. The halogens exist, at room temperature, in all three states of matter:

Answer : The correct option is Bromine.

Explanation :

Halogen : It is a group which is present second last in the periodic table and they belongs to group 17.

The halogen contains five elements which are fluorine, chlorine, bromine, iodine and astatine.

As per the question,

Argon belongs to group 18 which is a noble gas.

Calcium belongs to group 2 which is a alkaline earth metal.

Lithium belongs to group 1 which is also a alkali metal.

Bromine belongs to group 17 which is a halogen.

Therefore, the correct answer is Bromine.

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