1. Bohr Model of the Atom (p. 134-137) Read the text
Ch. 6.2 – Hydrogen Atom
Bohr Model of the Atom (p ) Read the text

2. A. Line-Emission Spectrum
excited state
ENERGY IN
PHOTON OUT
ground state

3. B. Bohr Model
e- exist only in orbits with specific amounts of energy called energy levels
Therefore…
e- can only gain or lose certain amounts of energy
only certain photons are produced

4. B. Bohr Model 6
Energy of photon depends on the difference in energy levels
Bohr’s calculated energies matched the IR, visible, and UV lines for the H atom 5 4 3 2 1

5. C. Other Elements Helium
Each element has a unique bright-line emission spectrum.
“Atomic Fingerprint”
Helium
Bohr’s calculations only worked for hydrogen! 