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Noun: Na
  1. 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)
    - sodium, atomic number 11

Type of: metal, metallic element

Part of: brine, halite, rock salt, saltwater, seawater

Encyclopedia: Na,K-ATPase

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