atomic number 19

Noun

1.

atomic number 19 - a light soft silver-white metallic element of the alkali metal group; oxidizes rapidly in air and reacts violently with water; is abundant in nature in combined forms occurring in sea water and in carnallite and kainite and sylvite Synonyms: potassium, K

brine, carnallite, K, kainite, langbeinite, metal, metallic element, potassium, saltwater, seawater, sylvine, sylvite