why group 7 named halogens?what is meaning of halogens

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Solution

Hi,
The word halogen is also derived from Greek word 'halo' meaning salt and 'gen' meaning producing. The group 17 elements form salts namely fluorides, chlorides, bromides and iodides, many of which occur in sea water. Hence, the group got its name halogen.
Halogen means = Salt producing elements.

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Elements of which group are called Halogens?

1)Why does the size of atoms of halogen family decreases down the group??

2)reactivity of the atoms of halogen family decreases down the group ,why ??

3)why does the atom of halogen family do not react with water and acids??

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