What you’ll learn4 learning objectivesChoose one objective for a focused lesson, or study the complete topic.—Data reference—Important constants and standardsUse supplied constants and standards including R, F, Avogadro constant, electronic charge, molar gas volume at s.t.p. and room conditions, Kw and specific heat capacity of water.Syllabus objective—Data reference—Ionisation energies, electronegativity and Periodic TableUse ionisation energy tables, Pauling electronegativity values and the Periodic Table to support explanations of trends, bonding, periodicity and chemical behaviour.Syllabus objective—Data reference—Bond energiesUse exact and average bond energy tables to calculate or interpret enthalpy changes and compare bond strengths, remembering that average bond energies are approximations.Syllabus objective—Data reference—Infrared absorption frequenciesUse characteristic infrared absorption frequency ranges to identify selected bonds and functional groups, especially in combination with other analytical evidence.Syllabus objective