Oxygen

Oxygen Oxygen, vaporific chemical element; symbol O; at. nary(prenominal) 8; at. wt. 15.9994; m.p. -218.4°C; b.p. -182.962°C; density 1.429 grams per liter at STP; valence -2. The existence and properties of group O had been notable by some(prenominal) scientists before the announcement of its isolation by Priestley in 1774. Scheele had also succeeded in preparing oxygen from a number of substances, besides publication of his findings was delayed until after that of Priestleys. As a result, Priestley and Scheele atomic number 18 credited with the discovery of the element independently. The particular that the gas is a component of the atmosphere was finally and by all odds established by Lavoisier a few years later. In 1929, W. F. Giaque and H. L. Johnston announced the discovery of two isotopes of oxygen, of mass numbers 17 and 18. Oxygen is a colorless, odorless, tasteless gas; it is the first member of Group 16 of the periodic table. It is denser than air and only slimly soluble in water. A poor conductor of set off and electricity, oxygen supports burning but does not burn. Normal atmospheric oxygen is a diatomic gas (O2) with molecular weight 31.9988. Ozone is a exceedingly reactive triatomic (O3) allotrope of oxygen. When cooled below its boiling stage oxygen becomes a pale blue naiant; when cooled silence further the liquid solidifies, retaining its color.

Oxygen is paramagnetic in its solid, liquid, and gaseous forms. Although eight isotopes of oxygen are known, atmospheric oxygen is a mixture of the tether isotopes with mass numbers 16, 17, and 18. Oxygen is super active chemically, forming compounds with more or less all of the el ements yet the inert gases. Oxygen unites d! irectly with a number of separate elements to form oxides. It is a constituent of many acids and of hydroxides, carbohydrates, proteins, fats and oils, alcohols, cellulose, and numerous different compounds such as the carbonates, chlorates, nitrates and nitrites, phosphates and phosphites, and sulphates and sulphites. The common response in which...If you hope to get a full essay, consecrate it on our website: OrderEssay.net

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