Classifying Matter
Metals and Nonmetals
Solids, Liquids, and Gases
Mixtures and Pure Substances
Elements
Reconsidering the Fire Element
Discovery of Modern Elements
Names of the Elements
Chemical Symbols
Symbols and Atomic Structures
The Periodic Law
A Closer Look: Elements 116 and 118 Discovered at Berkeley Lab
The Modern Periodic Table
Periodic Patterns
Chemical Families
Metals, Nonmetals, and Semiconductors
A Closer Look: The Rare Earths