oa Journal of the Astronomical Society of South Africa - The Structure of the atom

Volume 2, Issue 1
  • ISSN :



The molecular theory of matter has taught us that matter of all kinds is made up of minute particles, and that these particles may be divided up into a limited number of types -the 92 atoms of the 92 known chemical elements. These atoms are in size beyond the limit of the microscope, having a diameter of the order of one hundred-millionth of a centimetre. Atoms of different elements differ in size and mass and chemical properties from one another.

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