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sodium    音标拼音: [s'odiəm]
n. 钠

钠

sodium
n 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) [synonym: {sodium}, {Na}, {atomic number
11}]

Sodium \So"di*um\, n. [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.
[1913 Webster]

{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.
[1913 Webster]


Natrium \Na"tri*um\, n. [NL. See {Natron}.] (Chem.)
The technical name for {sodium}.
[1913 Webster]


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  • Sodium - Wikipedia
    It is a soft, silvery-white, highly reactive metal Sodium is an alkali metal, being in group 1 of the periodic table Its only stable isotope is 23 Na The free metal does not occur in nature and must be prepared from compounds
  • Sodium | Facts, Uses, Properties | Britannica
    sodium (Na), chemical element of the alkali metal group (Group 1 [Ia]) of the periodic table Sodium is a very soft silvery-white metal Sodium is the most common alkali metal and the sixth most abundant element on Earth, comprising 2 8 percent of Earth’s crust
  • Sodium Levels in Blood: Symptoms of Low Sodium, Test Results - WebMD
    Maintaining proper sodium levels in your blood is critical to health Learn about the symptoms of low sodium, sodium blood tests, and normal sodium levels
  • Sodium - Minecraft Mod
    Sodium is a powerful optimization mod for the Minecraft client, which greatly improves frame rates and micro-stutter, while fixing many graphical issues in Minecraft Unlike other rendering-focused mods, it boasts wide compatibility with the wider modding ecosystem
  • Sodium: Function, Benefits, Risks, Sources, and More - Health
    Excess sodium can raise blood pressure and increase the risk of heart and kidney diseases A teaspoon of table salt contains 2,300 milligrams of sodium, which meets the entire recommended daily
  • Hyponatremia (Low Blood Sodium): Symptoms, Causes, Treatment
    Low blood sodium, or hyponatremia, occurs when water and sodium are out of balance in your body It can cause weakness, headache, nausea, and muscle cramps
  • Sodium and Your Body: Benefits, Risks, and Daily Limits
    Table salt accounts for 90% of the sodium in the U S diet Sodium helps balance fluid and electrolyte levels in the body This balance can affect blood pressure and kidney and heart health
  • Sodium - Chemical Properties, Reactions, Uses | Britannica
    Sodium - Chemical Properties, Reactions, Uses: Generally, elemental sodium is more reactive than lithium, and it reacts with water to form a strong base, sodium hydroxide (NaOH)
  • Sodium Content - United Regional Health Care System
    Sodium Content of Common Foods The information below is provided to assist patients maintain a low-sodium diet The following numbers may be useful as a guide
  • Sodium: How to tame your salt habit - Mayo Clinic
    Find out how much sodium you need and learn how getting too much might affect your health Are you getting more sodium than health experts suggest is wise? If so, it could lead to serious health problems Sodium is a mineral You can find it naturally in food, such as celery or milk





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