History of the Atom and Size of the Atom

Atomic Mass and Mass Spectrometry

Isotopes & Atomic Mass

Fundamentals of Atomic Mass

atomic number and mass number

In-Depth Notes on Atomic Structure and Atomic Mass

Atoms, Subatomic Particles, Isotopes & Atomic Mass

A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes

2.02 structure/size of the atom

Atomic Structure, Isotopes, and Atomic Mass: Study Notes

Lecture 4: Atomic Theory, Isotopes, and Atomic Mass

Chapter 2 - Atoms: Structure and Mass

Chemistry(ends at atomic size trends)

Atomic Theory & Mass Relationships: Comprehensive Study Notes

Notes on Periodic Trends and Atomic Size

Atomic & Molecular Mass—Key Concepts and Significance

Isotopes, Atomic Masses, Electronic Structure, and Periodicity

Atomic Theory, Structure, and Mass Relationships Notes

Chemistry Notes: Atomic Masses and Chemical Formulas

Atoms and Molecules: Historical Background and the Law of Conservation of Mass