The Periodic Table Key terms and words for chemistry revision, module 3. 2.0 / 5 based on 1 rating ? ChemistryThe Periodic TableASOCR Created by: ParmzCreated on: 15-03-13 22:02 Period Is a horizontal row of elements in the Periodic Table. Elements show trends in properties across a period. 1 of 6 Periodicity Is a regular periodic variation of properties of elements with atomic number and position in the Periodic Table. 2 of 6 Thermal Decomposition Is the breaking up of a chemical substance with heat into at least two chemical substances. 3 of 6 Displacement reaction Is reaction in which a more-reactive element displaces a less-reactive element from an aqueous solution of the latter's ions. 4 of 6 Disproportionation Is the oxidation and reduction of the same element in a redox reaction 5 of 6 Precipitation reaction Is the formation of a solid from a solution during a chemical reaction. Precipitates are often formed when two aqueous solutions are mixed together. 6 of 6
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