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Silicon dioxide (SiO2) is ane o the maist common oxides on the surface o yird. Lik maist oxides, it adopts a polymeric structur.

An oxide /ˈɒksd/ is a chemical compoond that contains at least ane oxygen atom an ane ither element[1] in its chemical formula. Metal oxides typically contain an anion o oxygen in the oxidation state o −2. Maist o the Yird's crust consists o solid oxides, the result o elements bein oxidized bi the oxygen in air or in watter. Hydrocarbon combustion affords the twa principal carbon oxides: carbon monoxide an carbon dioxide. Even materials considered pure elements eften develop an oxide coatin. For example, aluminium foil develops a thin skin of Al2O3 (called a passivation layer) that protects the foil from further corrosion.[2] Different oxides o the same element are distinguished bi Roman numerals denotin thair oxidation nummer, e.g. iron(II) oxide versus iron(III) oxide.

References[eedit | eedit soorce]

  1. Foundations of College Chemistry, 12th Edition
  2. Greenwood, N. N.; & Earnshaw, A. (1997). Chemistry of the Elements (2nd Edn.), Oxford:Butterworth-Heinemann. ISBN 0-7506-3365-4.