[Free Registration/Login may be required to access all resource tools.] The focus in this learning module will be on the complexity of electron arrangement in atoms.

Acting as a subtopic of the General Chemistry Virtual Textbook's section on Atoms and the Periodic Table, this site discusses atomic electron configurations. Specifically, the Aufbau rules are discussed with information on energies of...

A complete overview of Hund's rules including exceptions.

Explains what the electron shielding effect is, how to calculate the amount of nuclear charge in an atom, how to use the number of orbitals to find the number of electrons in an atom, and Slater's method of calculating the shielding...

This chemistry class printout details the main points of molecular geometry and explains bond hybridization and bond angles.

A description of quantum theory, the Bohr model of the atom, the quantum mechanical atom, the Scrodinger equation, and quantum numbers.

The Schrodinger equation specifies atomic orbitals which are occupied by an electron. Quantum numbers can identify a unique energy level for each electron (set up in a PowerPoint presentation).

Quicktime movies of atomic orbitals.

Quicktime movies of atomic orbitals.

Quicktime movies of atomic orbitals.

Quicktime movies of atomic orbitals.

Quicktime movies of atomic orbitals.

Quicktime movies of atomic orbitals.

Quicktime movies of atomic orbitals.

Quicktime movies of atomic orbitals.

Quicktime movies of atomic orbitals.

A very detailed look at the element Gallium, a member of the Boron Group.

A very detailed look at the element Indium, a member of the Boron Group.

A very detailed look at the element Thallium, a member of the Boron Group.

A collection of video lectures from a general chemistry course taught at the University of California, Berkeley. The course covers topics like stoichiometry, acid-base and solubility equilibrium, oxidation-reduction reactions, chemical...

An excellent overview of Hund's Rules. Discusses all three rules thoroughly with provided diagrams.

Here you can find lots of great information about helium. Learn about its electrons, where it exists in nature, and about the element itself!

Here at Chem4Kids you can find some great information about the 4th element in the periodic table, "beryllium." Content focuses on beryllium's electrons, where you can find beryllium in nature, and how beryllium combines with other...

Here at Chem4Kids.com you can find some great information about the 5th element in the periodic table, "boron." Content focuses on boron's electrons, where you can find boron in nature and in the home, and how boron combines with other...