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Bohr's Conclusions

Think of an atom as a miniature solar system

3 orbits are permitted for this atom

1. Permitted orbits of an electron in an atom are limited

2. Each orbit is a different energy

3. Inside orbits have lower energies than the outside ones

4. When electrons in an atom change energy states they absorb or release energy

• Up energy level,
energy absorbed

• Down energy level,
energy  released as light

Permitted Orbital Energies for Hydrogen - Reference table

Each orbital is associated with a specific energy

• Electrons can only absorb or emit energy that is equal to the difference between the absolute value of 2 energy levels.

• A single photon of energy is given off when electrons go down energy levels.

Bohr Atom Examples