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chemistry:
chemistry: definitions for all papers:
Question | Answer |
---|---|
1. relative atomic mass? | weighted mean mass of an atom of an element relative to 1/12 of the mass of one carbon-12 atom |
3. dynamic equilibrium? | rate of the forward and backward reaction are equal and the concentration of reactants and products remains constant |
4. electronegativity? | ability of an atom to attract bonding pair of electrons in a covalent bond |
7. first ionisation energy? | energy needed to remove one electron from each atom in one mole of gaseous atoms to form one mole of gaseous ions |
8. acid? | proton donor |
9. addition polymerisation? | monomers added together to make long chain polymer |
10. atom economy? | (molecular mass of product / sum of molecular mass of all products) x 100 |
11. mean bond enthalpy? | enthalpy change needed to break the covalent bond into gaseous atoms averaged over different molecules |
12. |