| He said electrons travel outside the nucleus, which is known as the Planetary Model First electron level carries 2, second 8, third 8, fourth 16, etc. - He explained the energy levels as quantized. - E.g. You have stairs, lets say you can skip two steps, this is the opposite of quantized. With electrons they cannot skips steps, they have to go through each level, and they need energy to pass through each level. - N = 1 à 5 (N means Energy) it is the principle quantum # o N = 1 is the ground state and lowest energy level, the electron can get no closer to the proton o The lower the energy, the more stable the atom o When an electron is in a higher (less negative) energy orbit (i.e. n=2 or higher) the atom is said to be in an excited state o Energy must be absorbed for an electron to move to a higher state (one with a higher n value) o Energy is emitted when the electron moves to an orbit of lower energy (one with a lower n value) - How do fireworks operate? Light is the source of the explosion, everything goes up you see light (or energy) and sound (another form of energy). Certain elements turn colors when heated ….copper turns green, potassium turns to light purple, lithium or strontium turns red, sodium turns yellow. - Emission = when electron emits or lets off a photon or light. § Fluorescence – Quicker than phosphorescence § Phosphorescence - Slower than fluorescence | 
