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  1. Alkali metal | Definition, Properties, & Facts | Britannica

  2. Alkali metal - Reactivity, Group 1, Properties | Britannica

  3. Alkali metal - Properties, Reactivity, Uses | Britannica

  4. Types and properties of alkali metal | Britannica - Encyclopedia …

  5. Cesium | Description, Symbol, Uses, & Facts | Britannica

  6. Why are they called the alkali metals? | Britannica

  7. What is the definition of an alkali metal? | Britannica

  8. Francium | Radioactive, Alkali Metal, Rare | Britannica

  9. Alkaline-earth metal | Properties, List, & Reactivity | Britannica

  10. Lithium | Definition, Properties, Use, & Facts | Britannica