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1 February, 12:12

An isotope is an atom of an element that varies in mass number due to variation in the number of:

A. atoms.

B. protons.

C. neutrons.

D. electrons.

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  1. 1 February, 15:42
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    C. neutrons///Number of protons determines element, and number of electrons is always same as number of protons in atoms (no charge).
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