na

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Definition

Noun: 1. Sodium (symbol Na): A soft, silvery-white, highly reactive metallic element. It is an alkali metal, occurs abundantly in nature (especially in compounds like salt), and is essential for many biological processes.

Usage
  • Scientific/Technical Context: Used primarily in chemistry, biology, and industry to denote the element sodium.
    • The chemical symbol for sodium is Na.
    • Table salt is sodium chloride, or NaCl.
Advanced Usage
  • In Formulas and Notation: "Na" is almost exclusively used as the atomic symbol in chemical formulas and the periodic table.
    • The reaction between Na and water is highly exothermic.
Variants and Related Words
  • Sodium (n): The full name of the element represented by "Na".
  • Natrium (n): An older, Latin-derived name for sodium, from which the symbol "Na" originates.
Synonyms
  • Sodium: The common name for the element.
Noun
  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)

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