Review of Short Phrases and Links|
This Review contains major "Sodium"- related terms, short phrases and links grouped together in the form of Encyclopedia article.
- Sodium is a soft, bright, silvery metal which floats on water.
- Sodium is the fourth most abundant element on earth, comprising about 2.6% of the earth's crust; it is the most abundant of the alkali group of metals.
- Sodium is also the principal cation in seawater, although the concentration there is about 3.8 times what it is normally in extracellular body fluids.
- Sodium is the primary cation (positive ion) in extracellular fluids in animals and humans.
- Sodium is a soft, waxy, silvery reactive metal belonging to the alkali metals that is abundant in natural compounds (especially halite).
- Central oxytocin mediates inhibition of sodium appetite by naloxone in hypovolemic rats.
- When dietary sodium is low, aldosterone reduces the loss of sodium in urine appropriately.
- Sodium deficiency leads to a variety of autonomic and neuroendocrine changes, including increases in circulating AII and aldosterone.
- Based upon their sodium appetite-specific activation, the HSD2 neurones clearly integrate stimuli associated with prolonged sodium deficiency.
- It is now obtained commercially by the electrolysis of absolutely dry fused sodium chloride.
- Comments: Halite, sodium chloride (NaCl), is the most abundant of the EVAPORITE minerals.
- The most common compound is sodium chloride (table salt), but it occurs in many other minerals, such as soda niter, cryolite, amphibole, zeolite, etc.
- This alkali metal is also a component of sodium chloride (NaCl) which is vital to life.
- Sodium makes up about 2.6% by weight of the Earth's crust making it the fourth most abundant element overall and the most abundant alkali metal.
- Alkali metal is a term that refers to six elements: lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and francium (Fr).
- Restriction of sodium is also important, as is maintainance of dietary potassium.
- When dietary sodium is high, urinary sodium increases to excrete the excess.
- Sodium ions are necessary for regulation of blood and body fluids, transmission of nerve impulses, heart activity, and certain metabolic functions.
- Interestingly, sodium is needed by animals, which maintain high concentrations in their blood and extracellular fluids, but the ion is not needed by plants.
- Sodium is essential for life but rarely deficient in diets; high intake is linked to hypertension.
- Approximately 75 percent of sodium in Western diets originates from processed foods.
- About one-third to one-half of all hypertensive people are salt-sensitive and will benefit from a low-sodium diet.
- Lithium reacts with water less readily than sodium.
- Sodium hexafluoro aluminate ( cryolite), is used in the electrolysis of aluminium.
- As early as 1860, Kirchhoff and Bunsen noted the high sensitivity that a flame test for sodium could give.
- Sodium quickly oxidizes in air and is violently reactive with water, so it must be stored in an inert medium, such as kerosene.
- It cannot be maintained in an inert atmosphere and contact with water and other substances with which sodium reacts should be avoided.
- Used as a light filter in low pressure sodium vapor lamps.
- There are thirteen isotopes of sodium that have been recognized.
- Sodium is relatively abundant in stars and the D spectral lines of this element are among the most prominent in star light.
- Under extreme pressure, sodium departs from common melting behavior.
- Low-pressure sodium lamps give a distinctive yellow-orange light which consists primarily of the twin sodium D lines.
- Few common fire extinguishers work on sodium fires.
- Water, of course, exacerbates sodium fires, as do water-based foams.
- Lithium fires are difficult to extinguish, requiring special chemicals designed to smother them (see sodium for details).
- Severely dehydrated persons, such as people rescued from ocean or desert survival situations, usually have very high blood sodium concentrations.
- Intracerebral sodium concentration. The sodium concentration of the CSF is directly related to that of the blood plasma ( Doi et al.
- Excess sodium intake results in edema, high blood pressure, potassium deficiency, and liver and kidney disease.
- High sodium intake interferes with calcium retention.
- Put simply, normal growth requires the ingestion and retention of sodium.
- Double immunolabeling in the SON and PVN. The pattern of double labeling cells in the PVN after sodium ingestion is shown in Fig.
- Relative loss of body water will cause sodium concentration to rise higher than normal, a condition known as hypernatremia.
- Rat organum vasculosum laminae terminalis in vitro: responses to changes in sodium concentration.
- With oxygen and a metallic element, carbon forms many important carbonates, such as calcium carbonate (limestone) and sodium carbonate (soda).
- Sodium Na From the English, " soda ", because of relation about caustic soda, soda ash, baking soda and other Sodium compounds.
- Other sources of sodium are not as well recognized: condiments, sauces, baking soda, baking powder, and bread.
- A mercury cell electrolysis and hydrolysis of the amalgam with sodium hydroxide leads to sodium gallate.
- In many respects, potassium and sodium are chemically similar, although organisms in general, and animal cells in particular, treat them very differently.
- This method is less expensive than the previous method of electrolyzing sodium hydroxide.
- An exception to the periodic law is regarding sodium's density.
- Applications Sodium in its metallic form is an essential component in the making of esters and in the manufacture of organic compounds.
- Sodium imparts an intense yellow color to flames.
- After a while, it glowed a bright yellow and showed a strong sodium line that disappeared only after 10 minutes.
- In air, the bright silvery luster of freshly exposed sodium will rapidly tarnish.
- When sodium or its compounds are introduced into a flame it will contribute a bright yellow.
- Owing to its high reactivity, sodium is found in nature only as a compound and never as the free element.
- Sodium is much more reactive than magnesium; a reactivity which can be further enhanced due to sodium's much lower melting point.
- The metals which can accomplish this are sodium and lithium, with sodium being the most abundant and most commonly used.
- Sodium, like every reactive element, is never found free in nature.
- Notable Characteristics Like the other alkali metals, sodium is a soft, light-weight, silvery white, reactive element that is never found unbound in nature.
- At around 100 gigapascals, sodium will melt at near room temperature.
- The article highlights the creation of liquid sodium at room temperature.
- At room temperature, sodium metal is so soft that it can be easily cut with a knife.
- For example, sodium has the chemical symbol 'Na' after the Latin natrium.
- In medieval Europe a compound of sodium with the Latin name of sodanum was used as a headache remedy.
- Compounds of fluorine, including sodium fluoride (NaF), stannous fluoride (SnF 2) and sodium MFP, are used in toothpaste to prevent dental cavities.
- This requires some herbivores to obtain their sodium from salt licks and other mineral sources.
- Hard soaps are generally sodium salt of certain fatty acids (potassium produces softer or liquid soaps).
- Sodium floats in water and decomposes it releasing hydrogen and forming hydroxide.
- Sodium floats in water, as well as decomposing it to release hydrogen gas and hydroxide ion s.
- Encyclopedia of Keywords > Nature > Alkali Metals
- Encyclopedia of Keywords > Nature > Chemistry
- Encyclopedia of Keywords > Nature > Matter > Materials
- Nature > Natural Resources > Minerals > Metals
- Technology > Energy > Heat > Temperature
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