The atomic mass of an element

A. The sum of the protons and electrons in one atom of the element

B. Twice the number of protons in one atom of the element

C. A ratio based on the mass of carbon-12 atom

D. A weighted average of the masses of an elements isotopes

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Oscar Delgado

28 June, 02:16

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Leland Stafford · Answer 1

The number of protons in the nucleus of an atom determines an element's atomic number.

The atomic mass of an elementA. The sum of the protons and electrons in one atom of the elementB. Twice the number of protons in one atom of the elementC. A ratio based on the mass of carbon-12 atomD. A weighted average of the masses of an elements isotopes