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What are the postulates of Bohr’s model of an atom?
  •   revolve around the nucleus in fixed paths called orbits.
  • Only certain special orbits are allowed inside the atom.
  • The do not emit energy while circling in discrete orbits. They absorb energy to climb to a higher level and release energy to fall to a lower level. These orbits are known as energy levels and are denoted by the letters or \(1, 2, 3, 4\).