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ChemTeacherContribute - Extended Guide. History of the Atom. Models for the Atom. Alkali Metals- Group 1 (IA). Alkaline Earth Metals- Group 2 (IIA). Pnictogens- Group 15 (VA). Chalcogens- Group 16 (VIA). Halogens- Group 17 (VIIA). Noble Gases- Group 18 (VIIIA). Physical and Chemical Changes. Law of Equilibrating Pressures. Is currently logged in. History of the Atom. Models for the Atom. Alkali Metals- Group 1 (IA). Alkaline Earth Metals- Group 2 (IIA). Pnictogens- Group 15 (VA). Chalcogens- Group 16 (VIA). Inside,...
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