The number of protons in the nucleus of the atom is equal to the atomic number. The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom is equal to the sum of the number of protons and neutrons in the nucleus.
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atoms are a part of the universe so they are like a ball, you can't put anything on top or it will fall
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option B is the correct answer
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i honetly dont thing anyone knows that so look it up
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