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definition of the word halogen

by the Wiktionnary

Wikipedia has an article on:
Halogen

Wikipedia

From Greek ἅλς ‘salt’ + -gen ‘produce’.

Singular
halogen

Plural
halogens

halogen (plural halogens)

  1. (chemistry) Any element of group 7, i.e. fluorine, chlorine, bromine, iodine and astatine, which form a salt by direct union with a metal.

Definition from Wiktionary
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