Khan Academy: Biology: Chemistry of Life: Valence Electrons and Bonding

Did you know matter is made up of atoms? In this article learn about the smallest unit of matter called the atom.

Review over covalent, hydrogen, and ionic bonding in this article. Learn how molecules are held together by chemical bonds.

An article discussing how chemical reactions make and break bonds between atoms.

Learn the basics of chemical reactions in this video. Understand that products and reactants can be reversible or irreversible depending on the reaction. [9:12]

Get a definition and an explanation of electronegativity with this video. Explore the pattern that exist between electronegativity and the atoms position on the periodic table. [9:53]

Learn the basics of the groups on the periodic table in this video. [8:19]

A video investigating the makeup of an atom. Learn that atoms are composed of protons, neutrons, and electrons. Understand that protons and neutrons determine the mass of an atom. Also, the atomic number gives you the number of protons...

Learn the fundamental properties of atoms in this article. Understand the definition of atomic number, atomic mass, and isotopes. [6 min, 50 sec]

Learn the basics about the forces between molecules called intermolecular forces in this video. [8:35]

Use this skill check to test your understanding of chemical bonds and reactions.