Atomic Model

An atom consists of three types of subatomic particles:
  • proton
  • neutron
  • electrons
Each subatomic particle have different properties. Students are advised to know their differences in terms of relative charge, relative mass and location in an atom.

In Paper 2 SPM 2006,  students are asked
  • to compare the relative mass and the charge of two of the subatomic particles[4 marks].
  • describe fully the atomic structure of lithium[6 marks].
  • draw the structure of an atom of sodium or potassium[7 marks].
In Paper 2 SPM 2007, students are asked to
  • describe and the atomic structure of hydrogen[4 marks].

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