15. a)List any two postulates of Bohr's model of an atom.
b) Draw a sketch of Bohr's model of an atom with four shells.
c) Name the three subatomic particles.
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Answer: a) Electrons revolve around the nucleus in a fixed circular path called "orbit" or "energy level".
Every circular orbit will have a certain amount of fixed energy.
b) I'm not really sure I can answer that.
c) Protons, electrons and neutrons.
Explanation:
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