Atomic Hotels Theory Floors of the hotel are

Atomic (Hotels) Theory Floors of the hotel are known as energy levels The period corresponds to the floor. The number of the floor is called the Principle Quantum Number Energy levels are divided into sublevels. These are the rooms of our atomic hotel. There are different types of rooms. Atomic Orbital - Region of high probability of finding an electron There are 4 types of rooms (orbitals). S, P, D, F rooms s - Spherical p - dumbbell d- clover leaf f - too complex to describe. s - superior p - preferred d- desirable f- fair

Atomic (Hotels) Theory Three Managers each with their own rule: 1. Aufbau principle Rooms closest to the basement are checked out first Electrons enter orbitals of lowest energy first 2. Pauli Exclusion Principle - no more than 2 per room An atomic orbital contains a maximum of 2 electrons

Atomic (Hotels) Theory 3. Hund’s Rule Best rooms are check out first Similar rooms must have an occupant before pairing up as roommates Roommates must have opposite spins to share a room When electrons occupy orbitals of equal energy, one electron enters each orbital until all the orbitals contain one electron with parallel spins

S-orbitals of the 1 st and 2 nd energy levels.

P-orbital 2 nd energy level