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. Measurements that have small random errors.

  • Precision
  • Anomaly
  • Accuracy
1 of 20

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2. The number of protons in its nucleus. Its is also equal to the number of electrons the atom contains. - this also defines the element and its position in the Periodic Table.

  • Atomic Number
  • Isotopes
  • Period

3. The energy required to break a mole of covalent bonds in the reactant, all reactants and products being in a gaseous state.

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

4. The substance dissolved in a solvent forming a solution

  • Solution
  • Solute
  • Solvent

5. A reaction that releases heat to the surroundings as a result of forming products with stronger bonds than the reactants.

  • Chemical Reaction
  • Exothermic Reaction
  • Endothermic Reaction


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