Acting as a subtopic of the General Chemistry Virtual Textbook's section on Atoms and the Periodic Table, this site discusses quantum numbers of electrons in atoms including topics such as principal quantum number and orbitals of the...

Using diagrams, illustrated examples, and student practice this chemistry class tutorial explains quantum numbers.

Acting as a subtopic of the General Chemistry Virtual Textbook's section on Atoms and the Periodic Table, this site discusses electron spin with related topics, such as the Pauli exclusion principle, quantum numbers, and more.

This chemistry e-textbook provides students with AP-level reading and practice material on atomic structure and periodicity.