Periodic Table

Transition Metals and Inner Transition Metals

Classifying Elements: Metals, Nonmetals, Metalloids

Alkali Metals and Alkaline Earth Metals

Periodic Trends: Electron Affinity and Electronegativity

Periods, Groups, and Blocks of the Periodic Table

Periodic Trends: Ionization Energy

Effective Nuclear Charge and Electron Shielding

Periodic Trends: Atomic and Ionic Radius

History: Mendeleev and Modern Periodic Law

Halogens and Noble Gases