oxygen
oxygen
Symbol: O
Atomic number: 8
Atomic weight: 15.9994
A colourless, odourless gaseous element belonging to group 16 of the periodic table. It is the most abundant element present in the earth's crust. It also makes up 20.8% of the Earth's atmosphere. For industrial purposes, it is separated from liquid air by fractional distillation. It is used in high temperature welding, and in breathing. It commonly comes in the form of Oxygen, but is found as Ozone in the upper atmosphere. It was discovered by Priestley in 1774.

Elements of periodic system. 2013.

  • Oxygen — (homonymie) Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom …   Wikipédia en Français

  • Oxygen — ist: das englische Wort für Sauerstoff der Name eines Schauspiels in zwei Akten von Carl Djerassi und Roald Hoffmann, siehe Oxygen (Schauspiel) der Name einer Soul Band, siehe Oxygen (Band) der Name eines XML Editors, siehe oXygen (Editor) der… …   Deutsch Wikipedia

  • Oxygen — Ox y*gen, n. [F. oxyg[ e]ne, from Gr. oxy s sharp, acid + root of gi gnesqai to be born. So called because originally supposed to be an essential part of every acid.] [1913 Webster] 1. (Chem.) A colorless, tasteless, odorless, gaseous element of… …   The Collaborative International Dictionary of English

  • oxygen — (n.) gaseous chemical element, 1790, from Fr. oxygène, coined in 1777 by French chemist Antoine Laurent Lavoisier (1743 1794), from Gk. oxys sharp, acid (see ACRID (Cf. acrid)) + Fr. gène something that produces (from Gk. genes formation,… …   Etymology dictionary

  • oxygen — [äk′si jən] n. [Fr oxygène, altered (1786) < earlier oxygine, lit., acid producing: so named (1777) by LAVOISIER Antoine Laurent < Gr oxys (see OXY 2) + L gignere, to beget (see GENUS): from the belief that oxygen is present in all acids] a …   English World dictionary

  • Oxygēn — (v. gr.), so v.w. Sauerstoff …   Pierer's Universal-Lexikon

  • Oxygēn — (Oxygenium, Oxygengas), Sauerstoff (s. d.) …   Meyers Großes Konversations-Lexikon

  • Oxygen — Oxygen, s. Sauerstoff …   Herders Conversations-Lexikon

  • oxygen — ► NOUN ▪ a colourless, odourless, gaseous chemical element, forming about 20 per cent of the earth s atmosphere and essential to life. ORIGIN from French principe oxygène acidifying constituent (because at first it was held to be the essential… …   English terms dictionary

  • Oxygen — This article is about the chemical element and its most stable form, O2 or dioxygen. For other forms of this element, see Allotropes of oxygen. For other uses, see Oxygen (disambiguation). nitrogen ← oxygen → fluorine ↑ O ↓ …   Wikipedia