Biochemistry Free & Easy

An accessible introduction to chemistry covering atoms, molecules, chemical reactions, stoichiometry, gas laws, and organic chemistry basics. Ideal for first-year students.

Saylor Academy's

A comprehensive atoms-first general chemistry textbook covering atomic structure, chemical bonding, thermodynamics, kinetics, and descriptive chemistry of all element groups.

Joshua Halpern

Covers the full spectrum of organic chemistry from structure and bonding to biomolecules. OpenStax 10th edition with detailed reaction mechanisms, spectroscopy, and practice problems.

John E. McMurry

Explores inorganic chemistry topics including coordination compounds, crystal structures, solid state chemistry, and transition metal chemistry. Based on the LibreTexts Wikibook platform.

Penn State University

A comprehensive digest of physical chemistry formulas, terms, and definitions with schematic figures and worked-out examples. Covers thermodynamics, phase equilibrium, electrochemistry, chemical kinetics, and colloid chemistry.

Anatol Malijevsky, Josef Novak, Stanislav Labik