Dictionary,Defintion,Meaning,What is Periodic law, Phosphagen, Periodic acid, Permalloys, Permanganic acid, Pernitric acid, Peroxide

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Home >> Inorganic Chemistry Dictionary >> Periodic law - Phosphagen

Your Ad Here	Periodic acid HIO₄2H₂O, water-and alcohol-soluble white crystals; loses water at 100˚C; used as an oxidant. Periodic law the law upon which the modern periodic table is based. Enunciated in 1869 by Mendeleev, this law stated that the properties of the elements are a periodic function of their atomic weights, i.e. if arranged in order of increasing atomic weight then elements having similar properties occur at fixed intervals. Certain exceptions or gaps in the table lead to the view that the nuclear charge is a more characteristic function, thus the modern statement of the periodic law is that the physical and chemical properties of elements are a periodic function of their proton number.
Permalloys a group of alloys of high magnetic permeability consisting or iron and nickel (usually 40-80%) often with small amounts of other elements (e.g., 3-5% molybdenum, copper, chromium, or tungsten). They have been used in thin foils in electronic transformers, for magnetic shielding, and in computer memories. Permanganic acid (HMnO₄) a hypothetical acid known only in solution or in the form of its salts, the permanganate. Pernitric acid (HNO₃) obtained by dissolving nitrogen pentaoxide in hydrogen peroxide at low temperatures.
Peroxide a peroxide may be regarded as a salt of hydrogen peroxide which contains at least one pair of oxygen atoms bonded by a single covalent bond (O-O)2-, and which in addition to its oxidising and reducing properties, behaves as an extremely weak acid. Peroxosulphuric (VI) acid (Caro’s acid, H₂SO₅) A white crystalline solid formed by reacting hydrogen peroxide with sulphuric acid. It is a powerful oxidising agent. pH a term used to describe the hydrogen-ion activity of a system; it is equal to-log aH+., hear aH is the activity of the hydrogen ion; in dilute solution, activity is essentially equal to concentration and pH is defined as –log10 [H+], where [H+] is hydrogen-ion concentration in moles per liter; a solution of pH 0 to 7 is acid, pH of 7 is neutral, pH over 7 to 14 is alkaline	Your Ad Here
pH scale the pH scale is a measure of acidity or alkalinity of a solution. The lower the value, the more acidic is the solution. The pH = 7 is for a neutral solution. Phosphagen a compound found in animal tissues that provides a reserve of chemical energy in the form of high-energy phosphate bonds. The most common phosphagens are creatine phosphagens are creatine phosphate, occurring in vertebrate, muscle and nerves, and arginine phosphate found in most invertebrates. Phosphate coating coatings applied to steels and other alloys to make them anticorrosion and render the surfaces good for paintings etc.
Your Ad Here	Phosphate rock a sedimentary rock having largely calcium phosphate. Phosphide Binary compound of trivalent phosphorus, as in Na3P. Phosphine PH3, poisonous, colorless, spontaneously flammable gas with garlic aroma; soluble in alcohol, slightly soluble in cold water; boils at – 85˚C; used in organic reactions. Also known as hydrogen phosphide; phosphoretted hydrogen.

Phosphite

salt of phosphorous acid; contains the radical PO3-3, an example is normal sodium phosphite, Na3PO3.

Phosphomolybdates

salts of the hetero-phospho-molybdic acids but particularly of H3PMo12O40.

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