Over 99% of the mass of an atom is located a) in the nucleus. b) in the protons. c) in the neutrons. d) in the electron cloud. answer soon.

Question: Over 99% of the mass of an atom is located?

 in the nucleus

Explanation: because an atom is contained in the dense nucleus atoms and hydrogen remain in the nucleus

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(jacemorris04)

Hi There!

Question - Over 99% of the mass of an atom is located...

Answer - in the nucleus

Why - The amount of protons equals the amount of outer electrons which creates a natural charge (found in nucleus). All or most of the mass in an atom is in the nucleus.

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