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Noun atomic number 11 has 1 sense
- sodium, Na, 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)
--1 is a kind of metallic element, metal
--1 is a substance of seawater, saltwater, brine; halite, rock salt
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