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.

Six middle school chemistry lessons about the periodic table and bonding complete with handouts and animations.

From the Brockport High School Physics Labs web pages. Includes an excellent graphic depicting the energy levels of a hydrogen atoms and portraying the electron level transitions for the Lyman, Balmer, and Paschen series. Includes both...

This lab is designed to allow students to look at the connection between the gap between two energy levels and the frequency of the light that is given off when an electron traverses this gap.

University of Delaware Physics Department provides this indexing page for a slide show presentation.

The University of Delaware Physics Department provides this site from a site titled "Silicon, Circuits, and the Digital Revolution," here is a series of four pages which explain the details behind how semiconductors work. An introduction...

This multi-day lesson plan helps students to understand how the models of the atom have changed and how quantum mechanics affects the electrons as they orbit the nucleus.

This University of St. Andrews page provides an interesting discussion of the beginning of the age of quantum physics. (Quantum physics/mechanics is thought to govern the energy levels of electrons in atoms.) There is a references link...

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

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).

Elements in the same group in the periodic table have similar chemical properties. This is because their atoms have the same number of electrons in the highest occupied energy level. Group 1 elements are reactive metals called the alkali...

College-level electrical engineering course highlighting electric power systems. Course introduces electric power and the conversion of electrical to mechanical energy. Course features include readings, assignments, and quizzes.

This chemistry e-textbook provides students with AP-level reading and practice material on atomic structure and periodicity.

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...

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.