alkali metal: Quick Facts

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Also Known As	Group 1 element • Group Ia element

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A color-coded periodic table of the elements displays each element's symbol and atomic number, with categories such as alkali metals, noble gases, halogens, transition metals, and actinoid elements distinguished by different background colors.

cesium atomic clock

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sodium lithium potassium cesium rubidium francium chemical element rare-earth element transition metal hydrogen actinoid element alkaline-earth metal carbon group element boron group element oxygen group element nitrogen group element halogen

Periodic Table of the elements concept image (chemistry)

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