Definitions of Key Terms: OCR AS Chemistry Unit 2 (F322)

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  • Created by: katherine
  • Created on: 11-04-14 15:09

1. Define structural formula

  • the simplest whole-number ratio of atoms of each element present in a compound
  • a formula showing the minimal amount of detail for the arrangement of atoms in a molecule
  • the simplest algebraic formula of a member of a homologous series
  • C3H8
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2. Define skeletal formula

  • a simplified organic formula, with H atoms removed from the alkyl chains, leaving just a C skeleton and associated functional groups
  • the simplest whole-number ratio of atoms of each element present in a compound
  • the number of atoms in an element in a molecule
  • C3H8

3. Define empirical formula

  • The simplest algebraic formula of a member of a homologous series
  • A formula shown the minimal detail for the arrangement of atoms in a molecule
  • The simplest whole-number ratio of atoms of each element present in a compound
  • The number of atoms of each element in a molecule

4. Define homolytic fission

  • the breaking of a covalent bond with one of the bonded elections going to each atom to form 2 radicals
  • the breaking of a covalent bond with both of the bonded electrons going to one of the atoms forming a cation (+ve) and an anion (-ve)
  • a species with an unpaired electron
  • C2H4

5. Define functional group

  • the part of the organic molecule responsible for its chemical reactions
  • a series of organic compounds with the same functional group but with each successive ember differing by CH2
  • a species with an unpaired electron
  • compounds with the same structural formula but with different arrangements of the atoms in space

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