atomic number 11

Noun

1.

atomic number 11 - a silvery soft waxy metallic element of the alkali metal group; occurs abundantly in natural compounds (especially in salt water); burns with a yellow flame and reacts violently in water; occurs in sea water and in the mineral halite (rock salt) Synonyms: Na, sodium

brine, halite, metal, metallic element, Na, rock salt, saltwater, seawater, sodium