Question

define the isotopes​

Answer 1

Answer:

one of two or more forms of a chemical element that have different physical characteristics but the same chemical characteristics

Explanation:

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Answer 2

Answer:

each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.