An isotope is a chemical element that exists in two or more forms. Different isotopes of an element have the same number of protons in the nucleus, giving them the same atomic number, but each elemental isotope has a variable atomic weight due to the different number of neutrons.
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Answer:
An isotope is a chemical element that exists in two or more forms. Different isotopes of an element have the same number of protons in the nucleus, giving them the same atomic number, but each elemental isotope has a variable atomic weight due to the different number of neutrons.
Explanation: