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Chemistry notes (metals)

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Unit 8 Topic 2 Metals form ionic compounds with nonmetals. The formulas for these compounds are determined by balancing out the positive charge of the metal ion and the negative charge of the nonmetal. The names of these compounds are determined by using the name of the metal followed by the nonmetal with an ?ide? ending or the name of the polyatomic ion. Alkali metals (group 1) form ions with a +1 charge. When combining with elements from group 17 (halogens) they combine in a 1:1 ratio of metal (+1) to nonmetal (-1). Li+1 + F-1 ( LiF lithium fluoride Na+1 + Br -1 ( NaBr sodium bromide Cs+1 + I-1 ( CsI cesium iodide When combining with elements from group 16 they combine in a 2:1 ratio of metal (+1) to nonmetal (-2). K+1 + O-2 ( K2O potassium oxide

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