Question

Why are elements of group VIIA(17) called halogens?

Answer 1

Group 17 elements are called halogens because halogen is a Greek word which means 'salt producing'.Halogens include fluorine, chlorine, bromine, iodine and astatine. They all are non-metals. They react with metals to form compounds called salts.

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Answer 2

Explanation:

The elements of Group VIIA (new Group 17 – fluorine, chlorine, bromine, iodine, and astatine) are called the halogens (tan column). The term “halogen” means “salt-former” because these elements will readily react with alkali metal and alkaline earth metals to form halide salts. The halogens all have the general electron configuration ns 2 np 5 , giving them seven valence electrons. They are one electron short of having the full outer s and p sublevel, which makes them very reactive.