[Free Registration/Login may be required to access all resource tools.] Describes the modern concept of the atomic nucleus.

[Free Registration/Login may be required to access all resource tools.] The nucleus of an atom and what holds it together.

[Free Registration/Login may be required to access all resource tools.] Discusses the nucleus of an atom and what holds it together.

[Free Registration/Login may be required to access all resource tools.] In this lesson, students learn about the particles in an atomic nucleus, isotopes, and nuclear forces.

This online slide show presents the basic ideas behind the structure of the atomic nucleus.

[Free Registration/Login may be required to access all resource tools.] Atomic forces and how they interact with particles.

This website provides a short but detailed definition of atomic radii. Also shows the atomic radius plotted against atomic number.

This site from the encyclopedia Wikipedia provides a basic definition for what the atomic radius is, and an explanation of what covalent and metallic radii are.

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

Through informational text, interactive activities, and virtual animations students learn about the atomic nucleus, fission, fusion, and radioactive decay.

From the Atomic Archive - the online companion to the award-winning CD-ROM. This page defines nuclear fusion and depicts the process by an informative diagram. Includes numerical values which describe the typical energy values for fusion...

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.

Wikipedia provides the definition of the term, "Atomic number," a term used in chemistry and physics to represent the number of protons in the nucleus of an atom.

Determine the binding energy per nucleon for a random isotope.

Learn how you can find the probability of survival but cannot predict the time of disintegration of an atomic nucleus with this simulation. This site is best viewed with Internet Explorer.

Take a look at the parts of an atom and learn about its properties.

In this activity, students will review and investigate the stability of the nucleus of various elements and determine factors that affect that stability. Students will get an understanding of why certain nuclei are unstable and what type...

[Free Registration/Login may be required to access all resource tools.] In this lesson, students learn how scientists study the properties of stable nuclei in order to draw generalizations about what makes a nucleus stable. They look at...

[Free Registration/Login Required] Study the basics of radioactive decay and the properties of atomic nuclei in Marie Curie's laboratory and classroom. A PDF worksheet and a video tutorial are also available. [3:32]

This lesson explains Rutherford's gold foil experiment and the discovery of the nucleus. It is 2 of 3 in the series titled "Ernest Rutherford."

Interactive concept simulation demonstrates the nuclear fusion of deuterium and tritium inside a tokamak reactor.

Activity 3 of this module investigates: How do we know what's inside an atom? From Ernest Rutherford's Gold Foil Experiment to his investigation of the Plum Pudding model, students become aware of the Nuclear Model of an Atom. Also in...

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.