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i·so·tope
[ahy-suh-tohp]
NOUN [CHEMISTRY.]
1.
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
isotopes | Define isotopes at Dictionary.com
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en.wikipedia.org/wiki/Isotope

Isotopes are variants of a particular chemical element which differ in neutron number. All isotopes of a given element have the same number of protons in each ...

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The Isotopes (24-22) scored four runs in the eighth and two in the ninth inning to complete the biggest comeback of the season, walking off over the Oklahoma ...

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www.thoughtco.com/definition-of-isotopes-and-examples-604541

Mar 30, 2017 ... Isotopes are one form an element can take. This is the definition of an isotope, with examples.

www.chem4kids.com/files/atom_isotopes.html

Isotopes are atoms of elements with different numbers of neutrons We have already learned that ions are atoms that are either missing or have extra electrons.

www.britannica.com/science/isotope

Dec 12, 2016 ... Isotope, one of two or more species of atoms of a chemical element with the same atomic number and position in the periodic table and nearly ...

isotope.metafizzy.co

CDN. Link directly to unpkg. <script src="https://unpkg.com/isotope-layout@3/dist/ isotope.pkgd.js"></script> <!-- or --> <script ...

.ask.com/youtube?q=Isotopes&v=EboWeWmh5Pg
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 ...