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Alkali metal | Definition, Properties, & Facts | Britannica
Alkali metal - Reactivity, Group 1, Properties | Britannica
Alkali metal - Properties, Reactivity, Uses | Britannica
Types and properties of alkali metal | Britannica - Encyclopedia …
Cesium | Description, Symbol, Uses, & Facts | Britannica
Why are they called the alkali metals? | Britannica
What is the definition of an alkali metal? | Britannica
Francium | Radioactive, Alkali Metal, Rare | Britannica
Alkaline-earth metal | Properties, List, & Reactivity | Britannica
Lithium | Definition, Properties, Use, & Facts | Britannica