| A | B |
|---|
| Formula for number of orbitals in sublevel | 2L + 1 |
| Formula for number of electrons possible in sublevel | 2(2L + 1) |
| Formula for total electrons possible for energy level | 2 x n(squared) |
| Hund's rule | orbitals of equal energy are each occupied by one electron before any pairing occurs by adding a second electron |
| Electrons are found in orbits, or energy levels | Bohr |
| Energy is quantized | Planck |
| Light is made of photons | Einstein |
| It is impossible to know velocity and position of electron simultaneously | Heisenberg |
| current quantum mechanical model; electrons in orbits | Schrodinger |
