[Free Registration/Login may be required to access all resource tools.] Rutherford's discovery of the nucleus and his planetary model of the atom.

Students build atoms of elements 1-20. The entire set can be hung from the ceiling in order of the Periodic Table to be referred to throughout the Chemistry class/unit. This is helpful when teaching bonding and patterns of the Periodic...

Learners create models of atoms then compare the various aspects of the atoms including; relative size, charge, positions of subatomic particles, and identity of the atom based on proton, neutron, and electrons with the class.

This Nobel Foundation site provides the "Presentation Speech by Professor S.A. Arrhenius, Chairman of the Nobel Committee for Physics of the Royal Swedish Academy of Sciences, on December 10, 1922."

Visit this site for an interactive tour of the atom and all aspects of particle physics. View the animations available with almost every description on this site. A great place for the fundamentals of particles and forces including a...

A brief explanation is provided for designing a stable atom. You can also refer to a labeled model of a carbon atom. This resource also has a link to an atom building activity.

Presents the history of the atom with a New Age perspective on some aspects. It describes the concept of the atom in Vedic philosophy and that developed by Democritus. Goes on to look at the models proposed by John Dalton, J.J. Thomson,...

Explains what Bohr's model of the atom is, the characteristics of the ground and excited states of an atom, and the electron configuration for each in the example of Phosphorus.

This site from General Chemistry Online of the Frostburg State University provides an explanation of Thomson's discovery of the electron using a cathode ray tube and also his plum cake model of the atom.

Activity 4 of this module determines: Which model best supports our observations? This activity reviews the evidence gathered in this investigation and considers how that evidence informs your model of matter. A timeline of the history...

Find out if you know enough about atoms to build them. The goal of the activity is to build an atom of a particular element by dragging the correct numbers of neutrons, protons and electrons into the atom.

Acting as a subtopic of the General Chemistry Virtual Textbook's section on Atoms and the Periodic Table, this site discusses the hydrogen atom and its relation to spectrum. Included in the discussion is information on the Bohr model...

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...

Short slide show provides basic information about drawing Lewis dot structures for covalent compounds. Starts with anatomy of the atom, and then shows the relationship between atomic particles and the Periodic Table of Elements. Offers...

[Free Registration/Login may be required to access all resource tools.] Explains the idea of a scientific model and the development of Thomson's plum pudding model of the atom.

[Free Registration/Login may be required to access all resource tools.] This site explains Rutherford's discovery of the nucleus and the planetary model of the atom and the role of gold foil experiment in refining the atomic model. It...

[Free Registration/Login may be required to access all resource tools.] Thomson's discovery of the electron and his plum pudding model of the atom.

Acting as a subtopic of the General Chemistry Virtual Textbook's section on Atoms and the Periodic Table, this site discusses Niels Bohr and his work with the atom. Topics covered in the discussion include the atom before Bohr, Bohr's...

Slideshow looking at the history of models of the atom, including those proposed by John Dalton, J.J. Thomson, Ernest Rutherford, Niels Bohr, and James Chadwick. Discusses subatomic particles, including the numbers of protons, neutrons,...

This is an excellent site with information on the discovery of the atom and the different models. Includes a sample question and answer using Planck's constant.

The General Chemistry Virtual Textbook, or Chem 1, is broken into several sections covering various aspects of topics related to chemistry. This section deals with chemical bonds and seeks to answer the question, why do chemical bonds form?

Scientists' understanding of the structure of the atom and of its component particles grows, the phone and radio become common, and the modern television is born.

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.

An outstanding site that can best be described as student friendly. It describes the main differences between the classical and quantum models of the atom. Clear and well illustrated.