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Oxygen atoms have 6valence electrons.Oxygen has actually six valence electrons, two in the 2s subshell and 4 in the 2p subshell.Oxygen (O) isa nonmetallic chemical element of Group 16 (VIa, or the oxygen group) the the periodic table.Oxygen is a colourless, odourless, tasteless gas essential to living organisms, gift taken increase by animals, which transform it to carbon dioxideplants, in turn, utilize carbon dioxide together a source of carbon and return the oxygen come the atmosphere.

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Key Points

Oxygen was discovered about 1772 by a Swedish chemist, Carl Wilhelm Scheele, who derived it by heating potassium nitrate, mercuric oxide, and also many other substances.At 46 per centof the mass, oxygen is the many plentiful element in Earth’s crust.The ratio of oxygen by volume in the atmosphere is 21 every centand by weight in seawater is 89 per cent.