9. An element's atomic number is the A. mass of the atom. B. number of protons in an atom's nucleus. C. sum of the protons and neutrons in an atom. D. weight of the atom.

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asked Jul 15, 2018 123k views

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9. An element's atomic number is the A. mass of the atom. B. number of protons in an atom's nucleus. C. sum of the protons and neutrons in an atom. D. weight of the atom.

Social Studies
high-school

LoMaPh asked

by LoMaPh

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number of protons in an atom's nucleus

Little Ball answered Jul 16, 2018

by Little Ball

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B number of protons

Souad answered Jul 19, 2018

by Souad

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