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].