Definitions of Key Terms: OCR AS Chemistry Unit 2 (F322) 3.0 / 5 based on 1 rating ? ChemistryKey DefinitionsASOCR Created by: katherineCreated on: 11-04-14 15:09 Define empirical formula The simplest whole-number ratio of atoms of each element present in a compound 1 of 13 Define general formula the simplest algebraic formula of a member of a homologous series 2 of 13 Define molecular formula the number of atoms of each element in a molecule 3 of 13 Define structural formula a formula showing the minimal amount of detail for the arrangement of atoms in a molecule 4 of 13 Define skeletal formula a simplified organic formula, with H atoms removed from the alkyl chains, leaving just a C skeleton and associated functional groups 5 of 13 Define displayed formula a formula showing the relative positioning of all the atoms in a molecule and the bonds between them 6 of 13 Define homologous series a series of organic compounds with the same functional group, but with each successive member differing by CH2 7 of 13 Define a radical a species with and unpaired electron 8 of 13 Define functional group the part of the organic molecule responsible for its chemical reactions 9 of 13 Define electrophile an atom that is attracted to an electron-rich atom, where it accepts a pair of electrons to form a new covalent bond 10 of 13 Define homolytic fission the breaking of a covalent bond with one of the bonded elections going to each atom to form 2 radicals 11 of 13 Define curly arrows show the movement of an electron pair in the breaking down or formation of a new covalent bond 12 of 13 Define structural isomer molecules with the same molecular formula but with different structural arrangements of atoms 13 of 13
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