An exceptionally thorough resource with an amazing set of data on krypton, it chemical and physical properties, its electron configuration and its isotopes, among other things.

Some basic information along with good information on uses and health related facts on arsenic.

An exceptionally detailed and helpful resource for all sorts of information on nitrogen.

Excellent source of information on phosphorus including its physical and chemical properties. Highly recommended.

This is as helpful and detailed a reference as you'll likely find on iodine or any basic information relating to iodine. Highly recommended.

A great site with a wealth of information on aluminum. Exceptionally thorough and helpful.

A very extensive sight on argon. Well organized and extremely helpful.

Great site for all sorts of information on radon. Very thorough and well organized. Highly recommended.

A thorough a site on vanadium and its properties. Highly recommended.

The history, isotopes, and properties of the element Einsteinium are discussed on this site. Also listed is the atomic weight, atomic number, atomic symbol, and electron configuration.

Learn about radioactivity, the different types of radioactive decay, isotopes, and half-life of a radioactive element. Includes a long chart listing radioactive elements, atomic number and mass number, decay type, and length of half-life.

As the name of this site implies, this is a huge reference site for elemental information. Whether you are looking for properties or isotopes, this site probably has what you need. Images of structure and electron energy level can be...

As the name of this site implies, this is a huge reference site for elemental information. Whether you are looking for properties or isotopes, this site probably has what you need. Images of structure and electron energy level can be...

A nice summary of the chemical and physical properties of berkelium as well as additional information. Very nicely done and helpful.

A site containing a good deal of elemental information. Information on each element includes atomic number, atomic mass, melting point, boiling point, density, isotopes and more.

Information about the element, Nitrogen, atomic number 14. Covers common chemical transformations, its physical properties, atomic properties, how abundant it is on the Earth, and details about health-related regulations. Also discusses...

Information about the man-made element, Einsteinium, atomic number 99. Covers physical and atomic properties, how it was discovered, its history, how it is produced, uses, and a list of its isotopes.

Information about the element, Argon, atomic number 18. Covers physical and atomic properties, how abundant it is on the Earth, its history, isotopes, uses, and health considerations.

Information about the radioactive element, Uranium, atomic number 92. Describes its history, physical and atomic properties, how abundant it is on the Earth, and permissible exposure limits. Also discusses sources, uses, isotopes,...

Information about the element, Oxygen, atomic number 8. Covers history, physical and atomic properties, abundance, and permissible exposure limits. Also discusses forms of oxygen, isotopes, sources, and uses.

Information about the element, Fluorine, atomic number 9. Covers physical and atomic properties, how abundant it is on the Earth, and permissible exposure limits. Also discusses uses, isotopes, and health concerns.

Information about the element, Calcium, atomic number 20. Covers physical and atomic properties, sources, its role in geochemical cycles, how abundant it is on the Earth, its isotopes, some compounds of calcium, and its importance to...

Information about the element, Zinc, atomic number 30. Covers physical and chemical properties, how abundant it is on the Earth, where it occurs, isotopes, zinc in the environment, its role in human health, and the history of its use in...

A site containing a good deal of elemental information. Information on each element includes atomic number, atomic mass, melting point, boiling point, density, isotopes and more.