Definition of atomic number 19
English to English noun - 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
source: WordNet 3.0
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atomic number 19, atomic number 109, atomic number 1, atomic number 9, atomic number 39, atomic number 96, atomic number 90, atomic number 59, atomic number 61, atomic number 71, atomic number 29, atomic number 91, atomic number 51, atomic number 99, atomic number 17, atomic number 18, atomic number 10, atomic number 98, atomic number 31, atomic number 49
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