Crossword clues for sodium
Longman Dictionary of Contemporary English
The Collaborative International Dictionary
Natrium \Na"tri*um\, n. [NL. See Natron.] (Chem.) The technical name for sodium.
Douglas Harper's Etymology Dictionary
n. 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.
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) [syn: Na, atomic number 11]
Sodium is a chemical element with symbol Na (from Greek Νάτριο) and atomic number 11. It is a soft, silver-white, highly reactive metal. In the Periodic table it is in column 1 ( alkali metals), and like the other six elements in that column, it has a single electron in its outer shell that it readily donates, creating a positively charged atom—a cation. Its only stable isotope is Na. The free metal does not occur in nature, but must be prepared from compounds. Sodium is the sixth most abundant element in the Earth's crust, and exists in numerous minerals such as feldspars, sodalite and rock salt (NaCl). Many salts of sodium are highly water-soluble: sodium ions have been leached by the action of water from the Earth's minerals over eons; sodium and chlorine are the most common dissolved elements by weight in the oceans.
Sodium was first isolated by Humphry Davy in 1807 by the electrolysis of sodium hydroxide. Among many other useful sodium compounds, sodium hydroxide ( lye) is used in soap manufacture, and sodium chloride ( edible salt) is a de-icing agent and a nutrient for humans and cattle.
Sodium is an essential element for all animals and some plants. Sodium ions are the major cation in the extracellular fluid (ECF) and as such are the major contributor to the ECF osmotic pressure and ECF compartment volume. Loss of water from the ECF compartment increases the sodium concentration, a condition called hypernatremia. Isotonic loss of water and sodium from the ECF compartment decreases the size of that compartment in a condition called ECF hypovolemia.
By means of Na+/K+-ATPase, living human cells pump three sodium ions out of the cell in exchange for two potassium ions pumped in; comparing ion concentrations across the cell membrane, inside to outside, potassium measures about 40:1, and sodium, about 1:10. In nerve cells, the electrical charge across the cell membrane enables transmission of the nerve impulse—an action potential—when the charge is dissipated; sodium plays a key role in that activity.
Sodium was a massively multiplayer online game that was based in and exclusive to the PlayStation 3's online community-based social gaming network PlayStation Home. Sodium was a planned four-part series of games, only two of which were released by the time of Home's closure. It was developed by Outso, a developing company that developed spaces and content for Home, and it was published by Lockwood Publishing, who had published other content for Home. The first part, Sodium One, was released on December 17, to the European and North American versions of Home. It was later released in the Japanese and Asian versions on June 17, 2010 and July 29, 2010 respectively. The second part, Sodium 2: Project Velocity, was released on June 16, to the European and North American versions of Home.
Due to the nature of Home, the game continued to grow and expand as Home did. New games, virtual items, and community events were continually added until November 2014 when new content ceased to be published for Home, and Home closed on March 31, 2015.
Sodium (1963–1983) was an Irish-bred, British-trained Thoroughbred racehorse and sire best known for winning the classic St Leger Stakes in 1966. After running well without winning in 1965 he improved to become one of the best European colts of his generation in 1966 when he developed a rivalry with Charlottown. Sodium finished fourth behind Charlottown in the Epsom Derby but reversed the form to win both the Irish Derby and St Leger. He failed to reproduce his best form as a four-year-old and was retired to stud, where he had little success as a sire of winners in France and Japan.
Usage examples of "sodium".
The addition of a little sodium acetate to the solution after the final neutralising has a good effect.
This is specially apt to occur when sodium acetate is present, although it may also be due to excessive dilution.
Add 20 grams of sodium acetate, warm, and precipitate the lead with a dilute solution of potassium chromate.
Next add a strong solution of sodium acetate, until the solution ceases to darken on further addition, then dilute with water to half a litre.
Filter off the precipitate and wash with hot water containing a little sodium acetate, dissolve it off the filter with hot dilute hydrochloric acid, add ammonia in excess, and pass sulphuretted hydrogen for five minutes.
If the volumetric method is to be used, the lead sulphate should be dissolved out with a solution of sodium acetate instead of with the ammonium salt solution.
After cooling, a solution of sodium acetate is added until the colour of the solution is no longer darkened.
After precipitating as ammonic-magnesic phosphate with sodium phosphate, and well washing with ammonia, it is dissolved in dilute hydrochloric acid, neutralised with ammonia, and sodic acetate and acetic acid are added in the usual quantity.
It is also suggested that the fingerprint examiner wear rubber gloves when using acetone, benzine, xylene, formaldehyde, potassium hydroxide, or sodium hydroxide.
By mixing with milk of lime, the acidity is neutralised, zinc oxide and calcium sulphite are thrown down, and a solution of neutral sodium hydrosulphite is obtained which is more stable and can be kept longer without decomposition.
She uses the glove box for the last time, breaking open a vial of sodium fluoride solution and injecting an aliquot into every one of the cell cultures.
The less pure samples will show an excess of alkalinity because of the presence of sodium carbonate or of potassium carbonate.
The ignited residue is mixed with 6 or 7 grams of anhydrous sodium carbonate.
Lipsticks and Demerols, blushes and Percocet-5, Aubergine Dreams and Nembutal Sodium capsules are spread out all over the aquamarine countertops around the vanity sink.
Contains processed oleander leaves, saltpeter, oil of peppermint, N-Acetyl-p-aminophenol, zinc oxide, charcoal, cobalt chloride, caffeine, extract of digitalis, steroids in trace amounts, sodium citrate, ascorbic acid, artificial coloring and flavoring.