chemistry AS definitions 0.0 / 5 ? ChemistryDefinitionsASOCR Created by: LilafernimCreated on: 27-04-17 11:36 31095427168 Across 1. An atom (or group of atoms) which is attracted to and electron-rich centre or atom, where it accepts a pair of electrons to form a new covalent bond (12) 6. A species that releases H+ ions in an aqueous solution (4) 7. A substances that increases the rate of a chemical reaction without being used up in the process; provide an alternative route for the reaction with lower activation energy (8) 8. a compound that neutralises an acid to form a salt (4) 9. A seperation in electrical charge so that one atom of a polar covalent bond, or one end of a polar moolecule, has a small positive charge and the other has a small negative charge (6) Down 2. The stron electrostatic attraction between a shared pair of electrons and the nuclei of the bonded atoms (8, 4) 3. A reaction which a reactant is added to an unsaturated molecule to make one saturated molecule (8, 8) 4. The number of atoms per mole of the carbon-12 isotope. (6.02 x 10^23 mol-) (8, 8) 5. The minimum energy required to start a reaction by the breaking of bonds (10, 6) 10. A type of base that dissolves in water forming hydroxide ions, OH-(aq) ions (6)
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