Why are group `1` elements called alkali metals and group `17` are called halogens?

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Why are group I elements called alkali metals and group 17 are called halogens ?

Why group -1 elements are called alkali metals ?

Why group 1 elements are called alkali metals?

Why elements of group 17 are called halogens?

Why are group - 16 elements called chalcogens ?

Why group 2 elements are called alkaline earth metals?