IB Chemistry Definitions - Standard Level

Practise and master the definitions that correspond to the command terms define or distinguish used through out the IB Chemistry course.

1. The actual number of atoms of each element in the compound

  • Molecular Formula
  • Empirical Formula
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2. The energy required to break a mole of covalent bonds in the reactant, all reactants and products being in a gaseous state.

  • Average bond enthalpy
  • Standard Enthalpy of Reaction
  • First Ionization Energy

3. The gain of electrons

  • Reducing Agent
  • Reduction
  • Oxidation

4. The tendency of an atom in a molecule to attract a shared pair of electrons towards itself.

  • Electronegativity
  • First Ionization Energy
  • Electron Affinity

5. A horizontal row of elements in the Periodic Table. The atoms of the elements have the same number of shells but with an increasing number of electrons in the outer shell.

  • Mass Number
  • Period
  • Group


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