Question

What are the 6 models of the atom?

Answer 1

Atom:

• “ The word ‘atom’ has been derived from the Greek word ‘a-tomio’ which means ‘uncuttable’ or ‘non-divisible’”

The models of an atom are:

1. John Dalton’s atomic model: Dalton’s Billiard Ball (Solid Sphere) Model

• Dalton’s atomic theory was able to explain the law of conservation of mass, law of constant composition, and law of multiple proportions very successfully."

2. J.J. Thomson’s model: Plum Pudding model

• “J. J. Thomson, in 1898, proposed that an atom possesses a spherical shape in which the positive charge is uniformly distributed.”

3. Ernest Rutherford’s model: Nuclear model

• “Rutherford and his students (Hans Geiger and Ernest Marsden) bombarded very thin gold foil with α–particles. Rutherford’s famous α–particle scattering experiment.”

4. Niels Bohr’s model: Planetary model

• "He worked on the dual character of electromagnetic radiation."

5. Erwin Schrodinger’s model: Electron Cloud Model/Quantum Model

• “Quantum mechanics was developed independently in 1926 by Werner Heisenberg and Erwin Schrödinger.”

6. Wave mechanical model

• “The wave mechanical model proposed that the electrons act like particles as well as waves of energy.”