Sodium
/sˈoʊdiəm/
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Definition
(noun) The chemical element (symbol Na) with an atomic number of 11 and atomic weight of 22.990. It is a soft, waxy, silvery, reactive alkali metal that is never found unbound in nature.
Sentence Examples
Sodium reacts vigorously and exothermically with water.
Lithium, sodium, potassium, rubidium, caesium and francium are alkali metals.
CEFR Practice Quiz
Common table salt is primarily composed of ____ and chloride, and is used everywhere in cooking.