Turing House
Key Words and Meanings - Year 12 Chemistry
  • Module 2 - Atoms and reactions
    AtomThe basic units of matter and the defining structure of elements. 
    IsotopeIsotopes are forms of an element that have the same number of protons but different numbers of neutrons. 
    Ionic bondThe electrostatic force of attraction between a positively charged metal ion and a negatively charged non-metal ion. 
    MoleA standard scientific unit for measuring large quantities of very small entities such as atoms, molecules, or other specified particles. 
    Empirical formulaThe simplest whole number ratio of atoms of each element present in a compound. 
    Molecular formulaThe number and type of atoms of each element in a molecule. 
    AnhydrousA substance, especially a crystalline compound, containing no water. 
    Stoichiometric Relating to or denoting quantities of reactants in simple integral ratios, as prescribed by an equation or formula. 
    YieldHow much product is obtained compared to the maximum possible mass. 
    Atom economyThe atom economy of a reaction gives the percentage of atoms in reactants that form a desired product. 
  • Module 2 - Electrons, bonding and structure
    ElectronThe negatively charged particles of atom. 
    Atomic OrbitalsDescribe where an electron is likely to be found in an atom. 
    Giant ionic latticeA structure created by the arrangement of ions. 
    Covalent bondThe strong electrostatic attraction between a shared pair of electrons and the nuclei of the bonded atoms. 
    Ionic bondThe electrostatic attraction between positive and negative ions. 
    Dative covalentA dative bond (also called a co-ordinate covalent bond) is a covalent bond (a shared pair of electrons) in which both electrons come from the same atom. 
    Average bond enthalpy A measurement of covalent bond strength. 
    ElectronegativityThe ability of an atom to attract the bonding electrons in a covalent bond. 
    DipoleA molecule which has areas of asymmetrical positive and negative charge. 
    Intermolecular forcesAre the attractive and repulsive forces that arise between the molecules of a substance 
  • Module 3 - The periodic table
  • Module 4 - Basic concepts and hydrocarbons
  • Module 3 - Physical Chemistry
  • Module 4 - Alcohols, haloalkanes and analysis