unit 1 0.0 / 5 ? ChemistryCalculationsASAQA Created by: yasaman darvishCreated on: 27-04-14 20:54 reletive atomic mass Σ (perentage abundance of each isotope x mass of each isotope) /100 1 of 19 magnetic field attraction that keeps electrons from repelling each other 2 of 19 electronic configuration the arrangement of electron in an atom EG: the arrow and box / orbital method 3 of 19 first ionization energy The first ionisation energy of an element is the energy required to remove one electron from each of a mole of free gaseous atoms of that element. 4 of 19 oxidation A reaction in which the species looses electrons 5 of 19 sheilding The effect of the inner electrons screening the outer electrons from the nuclear charge 6 of 19 reflux a method of prolonged heating 7 of 19 reducing agent electron donor 8 of 19 halogen any element in group 7 9 of 19 reduction gains an electron 10 of 19 enthapy change the heat energy change in a reaction at constant pressure 11 of 19 lone pair electrons in the outer shell that are not involved in bonding 12 of 19 equalibrium a reaction in which the rates of forward and backward reactions are equal 13 of 19 number of moles concentration x volume (cm3) / 1000 or concentration x volume (dm3) 14 of 19 ideal gas equation pV=nRT 15 of 19 % atom economy (mass of desired product / total mass of reactants) x 100 16 of 19 percentage yield (actual yield / theoretical yield) x 100 17 of 19 ionization energy decreases down group 2, increases across a period 18 of 19 electrostatic attraction holds positive & negative ions together 19 of 19
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