As the name of this site implies, this is a huge reference site for elemental information. Whether you are looking for properties or isotopes, this site probably has what you need. Images of structure and electron energy level can be...

This site from the Purdue University provides quantum numbers explained in detail and shown how they specify the atomic orbital of each electron and their energy levels. Electronic configurations are explained. Learning exercises with...

The nature of insulators is described at the atomic level. Band gap theory is used to explain what distinguishes insulators from conductors.

Several pages from an excellent site which describe the science of spectroscopy. The unique atomic emission (and absorption) line spectrum of elements are illustrated and explained. Includes a Java applet depicting the quantum energy...

The Pauli Exclusion Principle requires that all electrons in an atom have unique energy levels.

The website provides an explanation of the electrons' position in their orbitals as they spin around the nucleus. Quantum theory is also explored by explaining that the exact location of a specific electron is a not exact but a guess.

Learners draw and interpret Lewis dot diagrams for individual atoms and both covalent and ionic compounds.

A very lengthy page from friesian.com discussing Bohr's theory of electronic energy levels and the explanation of commonly observed atomic emission line spectra. The concept of a photon and Einstein's observation of the photoelectric...

A nice, clear site, containing a good deal of elemental information, including atomic weight, density, boiling point, isotopes and more. An image shows the electron energy levels for the element.

A nice, clear site, containing a good deal of elemental information, including; atomic weight, density, boiling point, isotopes and more. An image shows the electron energy levels for the element.

This site has an interactive component that allows you to change the mass, number of electrons and the length of the box and see how it affects the energy levels. Requires Java.

Good site for viewing atomic orbitals. Click on an energy level and you get a simulated three dimensional image of the orbitals.

A very lengthy page from friesian.com discussing Bohr's theory of electronic energy levels and the explanation of commonly observed atomic emission line spectra. The concept of a photon and Einstein's observation of the photoelectric...

A very lengthy page from friesian.com discussing Bohr's theory of electronic energy levels and the explanation of commonly observed atomic emission line spectra. The concept of a photon and Einstein's observation of the photoelectric...

A very lengthy page from friesian.com discussing Bohr's theory of electronic energy levels and the explanation of commonly observed atomic emission line spectra. The concept of a photon and Einstein's observation of the photoelectric...

A very lengthy page from friesian.com discussing Bohr's theory of electronic energy levels and the explanation of commonly observed atomic emission line spectra. The concept of a photon and Einstein's observation of the photoelectric...

A very lengthy page from friesian.com discussing Bohr's theory of electronic energy levels and the explanation of commonly observed atomic emission line spectra. The concept of a photon and Einstein's observation of the photoelectric...

A very lengthy page from friesian.com discussing Bohr's theory of electronic energy levels and the explanation of commonly observed atomic emission line spectra. The concept of a photon and Einstein's observation of the photoelectric...

A very lengthy page from friesian.com discussing Bohr's theory of electronic energy levels and the explanation of commonly observed atomic emission line spectra. The concept of a photon and Einstein's observation of the photoelectric...

A very lengthy page from friesian.com discussing Bohr's theory of electronic energy levels and the explanation of commonly observed atomic emission line spectra. The concept of a photon and Einstein's observation of the photoelectric...

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).

A nice, clear site, containing a good deal of elemental information about the element holmium, including atomic weight, density, boiling point, isotopes and more. An image shows the electron energy levels for the element.

A nice, clear site, containing a good deal of elemental information, including atomic weight, density, boiling point, isotopes and more. An image shows the electron energy levels for the element.

A nice, clear site, containing a good deal of elemental information, including; atomic weight, density, boiling point, isotopes and more. An image shows the electron energy levels for the element.