Atoms, Bonds and Groups 1.3 0.0 / 5 ? ChemistryBonding & shapesASOCR Created by: Nina SkinnerCreated on: 29-03-13 17:21 period a horizontal row of elements in the periodic table. 1 of 5 periodicity a regular periodic variation of properties of elements with atomic number and position in the periodic table. 2 of 5 thermal decomposition the breaking up of a chemical substance with heat into at least two chemical substances. 3 of 5 disproportionation the oxidation and reduction of the same element in a redox reaction. 4 of 5 precipitation reaction the formation of a solid from a solution during a chemical reaction. precipitates are often formed when two aqueous solutions are mixed together. 5 of 5
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