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4 votes
An element's atomic number is the

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

2 Answers

3 votes
An element's atomic number is C. number of protons in an atom's nucleus. 
answered
User Mssm
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8.7k points
2 votes
C. Number of protons in an atom's nucleus
answered
User Ostap Brehin
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7.9k points

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