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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.
Source: Dictionary.com



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: Atoms: Isotopes


Chem4Kids.com! This tutorial introduces the basics of isotopes. Other sections include matter, elements, the periodic table, reactions, and biochemistry.

Isotope | Define Isotope at Dictionary.com


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 ...

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 »
By Rod Powers, About.com Guide

Glossary Term - Isotope - Science Education at Jefferson Lab


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 src="https://cdnjs.cloudflare.com/ajax/libs/jquery.isotope/2.2.2/isotope.pkgd.js"> ...

Atomic number, mass number, and isotopes | Introduction to the ...


How to use the atomic number and the mass number to represent different isotopes.

What are Isotopes? - YouTube


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 ...

Table of Isotopes - The Isotopes Project - Lawrence Berkeley ...


[Nuclide data only, extensive listing of nuclides] Provides isotope data for almost all known nuclides. From Berkeley Laboratory.

isotopes | Define isotopes at Dictionary.com
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Popular Q&A
Q: What is isotopes?
A: isotopes are atoms of d same element, having same atomic no but diff. atomin masses due to d difference in d number of neutrons present most common isotopes are... Read More »
Source: wiki.answers.com
Q: What are isotopes?
A: Isotopes Isotope is the word we use to talk about two different forms of the same element that have different numbers of neutrons in the nucleus. A given elemen... Read More »
Source: wiki.answers.com
Q: How to Find Isotopes.
A: Every atom has a certain number of protons, electrons and neutrons. Protons carry a positive charge, electrons carry a negative charge and neutrons do not carry... Read More »
Source: www.ehow.com
Q: What Are Radioactive Isotopes?
A: Radioactive isotopes, also called radioisotopes, are atoms with a different number of neutrons than is usual, making them unstable. A radioisotope's nucleus dec... Read More »
Source: www.ehow.com
Q: What is an isotope?
A: An isotope is one of two or more atoms with the same atomic number but with different Read More »
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