Dictionary.com · The American Heritage® Dictionary
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the different possible versions of each element are called isotopes. For example, the most common isotope of hydrogen has no neutrons at all; there's also a hydrogen isotope called deuterium, with one neutron, and another, tritium, with two neutrons.
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Isotope - Wikipedia, the free encyclopedia
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The same goes for isotopes. They are still the same element. They are just a little different from every other atom of the same element. There are a lot of carbon atoms in the universe. The normal ones are carbon-12. ... That happens because of the isotopes. If you are an atom with an extra electron, it is no big deal.
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The Berkeley Laboratory Isotopes Project's ... Welcome to the Periodic Table of the Isotopes. Choose an element to learn more about its isotopes. Click here for an animated glossary of nuclear terms you may encounter as you tour the isotopes.
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Most atoms have several naturally occurring isotopes (click here for a list of elements that have no isotopes). An isotope is an atom which contains a different number of neutrons in its nucleus than some other atom of the same element.
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Isotope summary with 44 pages of encyclopedia entries, essays, summaries, research information, and more. ... Forms of an element that have the same number of protons but differ in their atomic weights are called isotopes of that element. The atomic number of an atom is equal to the number of protons found within its nucleus.
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Many elements have isotopes. In most cases the ratio of isotopes to 'normal' atoms is quite low. Since the Mass Number is the number of Protons plus Neutrons you would expect it to be a whole number. Most Periodic Tables indicate Mass Number with a small decimal component.
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