AS Chemistry Unit 1 (OCR) Definitions Do you know all your chemistry definitions? 4.5 / 5 based on 5 ratings ? ChemistryASOCR Created by: Lucy CarrCreated on: 02-01-13 13:02 Relative atomic mass The weighted mean mass of an atom of an element when compared with 1/12 of the mass of carbon 12. 1 of 10 Ionisation energy The amount of energy required to remove one electron from every atom in one mole of gaseous atoms to form one mole of gaseous 1+ ions. 2 of 10 Electronegativity A measure of the ability of an atom to attract the bonded electrons in a covalent bond. 3 of 10 Covalent bond A bond formed by a shared pair of electrons 4 of 10 Ionic bond The electrostatic attraction between oppositely charged ions. 5 of 10 Metallic bonding The electrostatic attraction between a 'sea' of delocalised electrons and positive metal ions.. 6 of 10 Periodicity A repeating pattern (or trends) across different periods. 7 of 10 Hydrogen Bond Intermolecular force between a lone pair of electrons on an N, O or F atom in one molecule and a hydogen atom in another molecule containg F, N or O. 8 of 10 Permanent dipole-dipoe force An attractive force that exists between polar molecules 9 of 10 Dipole Opposite charges separated by a short distance in a molecule or ion. 10 of 10
Comments
Report
Report