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Group: Alkali metals

Alkali metals (1st main group) are shiny, reactive metals (except hydrogen) that have a single electron in their valence shell, which they can easily give up as strong reducing agents.

Hydrogencolorless gas (H₂)

Lithiumsilvery-white

Sodiumsilvery white metallic

Potassiumsilvery white, faint bluish-purple hue when exposed to air

Rubidiumgrey white

Caesiumpale gold

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