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. An emission spectrum that only has certain frequencies of light. It is produced by excited atoms and ions as they fall back to a lower energy level

  • Line Spectrum (Discontinuous Spectrum)
  • First Ionization Energy
  • Electronegativity
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2. A homogeneous mixture of a solvent with a solute - there is usually some interaction between the solvent and solute molecules

  • Solute
  • Solution
  • Solvent

3. The heat transferred during a reaction carried out under standard conditions.

  • Standard Enthalpy of Reaction
  • Standard State
  • Exothermic Reaction

4. The average mass of an atom, taking into account the relative abundances of all the naturally occurring isotopes of the element, relative to one atom of C-12

  • Mass Number
  • Relative Atomic Mass
  • Relative Molecular Mass

5. Measurements that have small systematic errors.

  • Precision
  • Accuracy
  • Outlier


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