Question

How do scientists determine the number of neutrons in an isotope of an atom?

A. They find the number of protons.

B. They divide the atomic mass by two.

C. They add the number of electrons and protons.

D. They subtract the atomic number from the atomic mass.

Answer 1

D.

The Atomic number represents the number of protons and electrons in an element, and the atomic mass represents the number of protons added to the number to the neutrons. Therefore if you have the atomic mass and atomic number of an element you can find the amount of neutrons in an element.

Answer 2

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