Atom

1. Periodic Table

1.1. Period

1.2. Chemical Family

1.3. Element

1.3.1. Isotope

2. Nuclear Decay

2.1. Alpha Particle

2.2. Beta Particle

2.3. Gamma Ray

2.3.1. Radioactive

2.4. Ion

2.5. Subatomic particle

2.6. Daughter Particle

3. Nucleus

3.1. Protons

3.2. Neutrons

4. Electron Cloud

4.1. Electrons

4.1.1. Electron Dot Diagram

4.1.2. Spin

4.1.3. Positron

4.1.4. Electron Configuration

4.1.4.1. Diagonal Rule

4.2. Shells

4.2.1. Subshells

4.2.1.1. Orbitals

4.3. Aufbau

4.4. Hund

4.5. Pauli Exclusion

4.6. Energy Level

4.6.1. Valence Electron

5. Numbers

5.1. Atomic Number

5.2. Mass Number

5.3. Atomic Radius