Meaning of ATOMIC NUMBER 11

WordNet Dictionary
	Definition:		[n]  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)
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	Synonyms:		Na, sodium
	See Also:		brine, halite, metal, metallic element, rock salt, saltwater, seawater