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Webster 1913 Edition


Sodium

So′di-um

,
Noun.
[NL., fr.E.
soda
.]
(Chem.)
A common metallic element of the alkali group, in nature always occuring combined, as in common salt, in albite, etc. It is isolated as a soft, waxy, white, unstable metal, so highly reactive that it combines violently with water, and to be preserved must be kept under petroleum or some similar liquid. Sodium is used combined in many salts, in the free state as a reducer, and as a means of obtaining other metals (as magnesium and aluminium) is an important commercial product. Symbol Na (
Natrium
). Atomic weight 22.990. Specific gravity 0.97.
Sodium amalgam
,
an alloy of sodium and mercury, usually produced as a gray metallic crystalline substance, which is used as a reducing agent, and otherwise.
Sodium carbonate
,
a white crystalline substance,
Na2CO3.10H2O
, having a cooling alkaline taste, found in the ashes of many plants, and produced artifically in large quantities from common salt. It is used in making soap, glass, paper, etc., and as alkaline agent in many chemical industries. Called also
sal soda
,
washing soda
, or
soda
. Cf.
Sodium bicarbonate
, and
Trona
.
Sodium chloride
,
common, or table, salt,
NaCl
.
Sodium hydroxide
,
a white opaque brittle solid,
NaOH
, having a fibrous structure, produced by the action of quicklime, or of calcium hydrate (milk of lime), on sodium carbonate. It is a strong alkali, and is used in the manufacture of soap, in making wood pulp for paper, etc. Called also
sodium hydrate
, and
caustic soda
. By extension, a solution of sodium hydroxide.

Webster 1828 Edition


Sodium

SO'DIUM

,
Noun.
The metallic base of soda. It is soft, sectile, white and opake, and very malleable. It is lighter than water.

Definition 2023


sodium

sodium

English

Sodium
Chemical element
Na Previous: neon (Ne)
Next: magnesium (Mg)

Noun

sodium (usually uncountable, plural sodiums)

  1. A soft, waxy, silvery reactive metal that is never found unbound in nature, and a chemical element (symbol Na) with an atomic number of 11 and atomic weight of 22.98977.

Synonyms

Derived terms

Related terms

Translations

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French

Pronunciation

  • IPA(key): /sɔ.djɔm/

Noun

sodium m (uncountable)

  1. sodium