Question

Isotopes of an element will always have the same A. number of protons. B. number of neutrons. C. number of electrons. D. mass.

Answer 1

The answer you're looking for is A.

Step-by-step explanation:

Atoms of the same element, containing the same number of protons, but different numbers of neutrons, are known as isotopes. Isotopes of any given element all contain the same number of protons, so they have the same atomic number...

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Answer 2

it's a and c because the number of protons and the number of electrons are always the same