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The ________ of an element is the total number of protons and neutrons in the nucleus.
A. energy level
B. charge
C. atomic number
D. mass number

Respuesta :

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Answer:

mass number!

Explanation:

remember your atomic number is the amount of protons in an atom while your mass number is the total number of neutrons and protons in a atom

Answer:

the answer is d

Explanation:

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