atomic number 55 meaning

UK US

atomic number 55 (noun): a soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal.

Definition of atomic number 55

  1. a soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal

    Synonyms: cesium, caesium, Cs

    Type of: metallic element

    Kinds: cesium 137

More about atomic number 55 on Wikipedia.