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Basic Chemistry Concepts

Isotope

mass number, atomic number, number of neutrons, number of protons, sum total

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Isotope, one of two or more species of atom having the same atomic number, hence constituting the same element, but differing in mass number. As atomic number is equivalent to the number of protons in the nucleus, and mass number is the sum total of the protons plus the neutrons in the nucleus, isotopes of the same element differ from one another only in the number of neutrons in their nuclei.



Article key phrases:

mass number, atomic number, number of neutrons, number of protons, sum total, isotopes, nuclei, nucleus, element, equivalent

 
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