any of two or more forms of a chemical element, having the same number of protons in the nucleus, or the same atomic number, but having different numbers of neutrons in the nucleus, or different atomic weights. There are 275 isotopes of the 81 stable elements, in addition to over 800 radioactive isotopes, and every element has known isotopic forms. Isotopes of a single element possess almost identical properties.
The three naturally-occurring isotopes of hydrogen. The fact that each isotope
has one proton makes them all variants of hydrogen: the identity of the isotope is
Chem4Kids.com! This tutorial introduces the basics of isotopes. Other sections
include matter, elements, the periodic table, reactions, and biochemistry.
any of two or more forms of a chemical element, having the same number of
protons in the nucleus, or the same atomic number, but having different numbers
Definition: (DOD) Forms of the same element having identical chemical properties but differing in their atomic masses due to different numbers of neutrons in their respective nuclei and in their nuclear properties. More »
Atoms that have the same number of protons but different numbers of neutrons
are called isotopes. The element hydrogen, for example, has three commonly ...
Isotope. Filter & sort magical layouts. Download isotope.pkgd.min.js ... <script
How to use the atomic number and the mass number to represent different
Jan 7, 2012 ... To see all my Chemistry videos, check out http://socratic.org/chemistry We'll learn
about what isotopes are and how to write atomic number and ...
[Nuclide data only, extensive listing of nuclides] Provides isotope data for almost
all known nuclides. From Berkeley Laboratory.