Atom

1. Element

1.1. Periodic Table

1.1.1. periods

1.1.1.1. atomic radius

1.1.2. chemical families

1.1.2.1. similar properties

2. Energy level

2.1. Gamma Rays

2.2. valence electrons

3. Ion

3.1. Charge

4. Radioactive

4.1. Nuclear Decay

4.1.1. Daughter Product

4.2. beta particle

4.3. Alpha particle

5. subatomic Particle

6. Nucleus

6.1. protons

6.2. neutrons

7. Electron CLoud

7.1. Electrons

7.1.1. Electron dot diagram

7.1.2. spin

7.1.3. Electron configuration

7.2. Shells

7.2.1. subshells

7.2.1.1. orbitals

7.3. Hunds

7.4. Aufbau

7.5. Paul's Exclusion

7.5.1. diagonal rule

8. Numbers

8.1. Atomic number

8.2. Mass number

9. isotope