CK-12 Foundation
Ck 12: Earth Science: Atoms to Molecules
[Free Registration/Login may be required to access all resource tools.] Examine the composition of matter.
CK-12 Foundation
Ck 12: Chemistry: Isotopes
[Free Registration/Login may be required to access all resource tools.] Defines isotope and describes calculations involving isotopes.
CK-12 Foundation
Ck 12: Physical Science: Isotopes
[Free Registration/Login may be required to access all resource tools.] Definition of isotopes, how they are named and their stability.
CK-12 Foundation
Ck 12: Physical Science: Isotopes
[Free Registration/Login may be required to access all resource tools.] Definition of isotopes, how they are named and their stability.
CK-12 Foundation
Ck 12: Physical Science: Neutrons
[Free Registration/Login may be required to access all resource tools.] Neutrons and how they cause different isotopes of an element, and the particles in neutrons.
Idaho State University
Radioactivity in Nature
Interesting information including: average annual dosage, radioactivity in space, in the human body, and in the oceans.
Nobel Media AB
The Nobel Prize: Glenn T. Seaborg Biographical
The Nobel Foundation provides a brief biography on Glenn Seaborg (1912-1999 CE), the co-recipient of the 1951 Nobel Prize in Chemistry. Read about Seaborg's education and personal life. Learn about his "Discovery of transuranium...
Annenberg Foundation
Annenberg Learner: Isotopes, a Weighty Matter: Isotope Quiz
You will be presented with three different isotopes of the same element. See if you can calculate the atom's average relative mass.
Physics Aviary
Physics Aviary: Practice Problems: Activity of an Isotope
Determine the activity of a radioactive sample by measuring the counts per minute that are detected by a sensor.
Physics Aviary
Physics Aviary: Practice Problems: Mass Spectrometer Problem
Determine the mass of two different isotopes of an element based on their deflection by a magnetic field.
Science Struck
Science Struck: Radioactive Isotopes in Medicine
Learn what radioactive isotopes are and the different ways that they are used in medicine.
Science Struck
Science Struck: Isotopes of Carbon
Describes the characteristics of carbon and what an isotope is. Presents a chart of carbon isotopes listing nuclide symbol, atomic weight, half-life, and nuclear spin, as well as a second chart listing radioactive carbon isotopes....
Science Struck
Science Struck: Bromine Isotopes
Describes the chemical properties of bromine and what an isotope is. Presents a chart of bromine isotopes listing nuclide symbol, neutron number, isotopic mass, and half-life, as well as a second simpler chart with more bromine isotopes.
Chiral Publishing
Chiral Publishing: An Introduction to Chemistry: Isotope Notation
Discover how to correctly write the notations for isotopes. Learn how using the atom's ionic charge can help determine the proper subscripts and superscripts to use.
CK-12 Foundation
Ck 12: Earth Science: Atoms to Molecules
[Free Registration/Login may be required to access all resource tools.] Examine the composition of matter.
CK-12 Foundation
Ck 12: Atoms to Molecules
[Free Registration/Login may be required to access all resource tools.] Examine the composition of matter.
Other
American Institute of Physics: Marie Curie and Radioactivity
A very readable account of the discovery of radioactivity and its properties.
Lawrence Berkeley National Laboratory
Berkeley Lab: Radioactivity in Nature
This entry provides a summary of radioactivity in nature and the decay chain.
Lawrence Berkeley National Laboratory
Berkeley Lab: Radioactive Dating
This site provides an overview of radioactive dating, a process used to determine the age of rocks and other materials.
Lawrence Berkeley National Laboratory
Berkeley Lab: Industrial Applications
Features an exploration of the many common industrial applications that use radioisotopes including smoke detectors, agriculture, arts and humanities, and the automobile industry.
Other
Chemistry 101 Notes: Isotopes and Atomic Symbols
These notes from a Chemistry 101 class at Indiana University Northwest provide a simple description of atomic symbols and two examples of how to use those symbols in isotope notation.
PBS
Pbs Teachers:nordic Sagas: Radioactive Reindeer
Demonstrate how soil absorbs radioactivity by simulating the absorption of the radioactive isotope from the Chernobyl disaster into the lichen of Scandinavia. Use a chart to figure out the half-life of the isotope.
Sophia Learning
Sophia: Isotopes: Lesson 9
This lesson will define an isotope and explain what happens if the number of neutrons in an atom changes. It is 9 of 9 in the series titled "Isotopes."
Sophia Learning
Sophia: Isotopes: Lesson 1
This lesson will define an isotope and explain what happens if the number of neutrons in an atom changes. It is 1 of 9 in the series titled "Isotopes."