Atomic Structure

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A video demonstration of the Formula from Mass Composition from Salman Khan of Khan Academy.

A video demonstration of the atom from Salman Khan of Khan Academy.

An interactive tool designed to help you develop an understanding of how Lewis Dot Structures are created.

Comprehensive and detailed explanations of how quantum numbers work, complete with pictures of orbitals, and diagrams illustrating the order of filling subshells.

Explains most of the periodic trends in terms of shielding of the nucleus by the inner shells of electrons. Includes a discussion of size (radius), ionization energy, electron affinity, electronegativity, metallic character, reactivity and common charges.

Describes the molecular geometry of various chemical compounds, giving the general description of each and names of the shapes.