1. Hydrogen Spectrum

2. Lyman series- transition to n = 1
(ultraviolet)
Balmer series- transition to n = 2
(visible)
Paschen series- transition to n = 3
(infrared)

3. Quantum Mechanics
De Broglie predicted that all moving objects have wavelike behavior
Classical mechanics describes the motions of bodies much larger than atoms
Quantum mechanics describes the motions of subatomic particles and atoms as waves

4. Heisenberg uncertainty principle-it is impossible to know exactly both the velocity and the position
of a particle at
the same time