Explanation of the evolution of atomic theory and the experimentation associated with these concepts.

An explanation of advanced atomic theory based on developed concepts from earlier scientific experimentation.

Discusses John Dalton's development of the atomic theory and the four main points of his theory. Includes references and a link to a quiz on Dalton's Atomic theory.

Article explaining the legacy of John Dalton. His research into gases led to his gas laws and then his proposed atomic model. The flaws in his atomic theory are discussed also. (Jan. 20, 2016)

Explains how James Chadwick came to develop his atomic theory by building upon the work of other scientists.

An introduction to the mole, a unit of measurement that quantifies atoms and molecules.

We gain a better understanding of pressure and temperature from the kinetic theory of gases, which assumes that atoms and molecules are in continuous random motion. Learn more about Kinetic Theory with the following detailed resource...

Learn how to calculate the kinetic energy of a gas molecule, describe the relationship between the temperature of a gas and the kinetic energy of atoms and molecule, and describe the distribution of speeds of molecules in a gas. The...

This site from the Le Moyne University provides excerpts from Dalton's "A New System of Chemical Philosophy" published in 1808. Includes Dalton's table of atomic weights and and scanned atomic symbols.

By the end of this section, you will be able to express the ideal gas law in terms of molecular mass and velocity; define thermal energy; calculate the kinetic energy of a gas molecule, given its temperature; describe the relationship...

A discussion of the theories of Democritus (c. 460-370 BC). He is best known as an atomist, having developed an atomic theory. Also discusses the ideas of other philosophers who are believed to have influenced Democritus.

This site from the General Chemistry Online of the Frostburg State University provides a review of the history of atomic theory, the discovery of the electron, and the discovery of the nucleus. Details on weighing atoms, ion charges,...

A look at the life of Democritus of Abdera. He helped to develop a theory of atomism, explained in detail here. Other significant ideas he had included his theory of perception, a theory of the soul and its relationship to living things,...

An online textbook containing an introduction to quantum chromodynamics (QCD). This is a proposed theory about what causes quarks and gluons to form hadrons. Article contains a description of lattice QCD, an approximation to QCD that is...

Read this detailed Nobel E-Museum biography which includes information on the scientific world of Joseph John Thomson, which gained world-wide recognition and earned Thomson the Nobel Prize in Physics.

Presents models of the atom developed by Thomson, Rutherford, Bohr, and Schrodinger. Includes successes and failures of each, illustrations, and detailed descriptions. Also discusses Dirac's model of the atom and introduces quantum...

Acting as a subtopic of the General Chemistry Virtual Textbook's section on Atoms and the Periodic Table, this site discusses the properties of the atoms individually in relation to the main group elements of the Periodic Table.

Using diagrams, illustrated examples, and student practice this chemistry class tutorial explains quantum numbers.

Have you ever wondered who discovered the electron? The answer is Nobel Prize winning physicist Sir Joseph John Thomson.

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...