Definitions For AS OCR Chemistry 2016 Definitions from glossary in the book. 0.0 / 5 ? ChemistryDefinitionsASOCR Created by: CatherineWrCreated on: 25-05-16 16:07 78351042196 Across 1. The continual boiling and condensing of a mixture back into the original container to ensure the reaction takes place fully, without the contents of the flask boiling dry. (6) 4. A compound that neutralises an acid to form a salt. (4) 5. Enthalpy difference between reactants and products in a reaction. (8, 6) 6. A region around the nucleus that can hold up to two electrons with opposite spins. (7) Down 2. A group of atomic orbitals with the same principal quatum number. AKA a main energy level. (5) 3. The equilibrium that exists in a closed system when the rate of the forward reaction is equal to the rate of the reverse reaction and the concentrations do not change. (7, 11) 7. The product of a reaction in which the H+ ions from the acid are replaced by metal or ammonium ions. (4) 8. A compound that only contains two elements. (6, 8) 9. The bond formed by the sideways overlap of two P orbitals, containing two electrons and with the electron density concentrated above and below the centre of the two bonding atoms. (2, 4) 10. An ion containing more than one atom. (10, 3)
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