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1. The modern periodic table is ordered by which of the following factors?

A. The number of electrons
B. The number of protons
C. The atomic mass
D. The elements

User SvenFinke
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2 Answers

0 votes

Answer:

C

Step-by-step explanation:

User TuanNguyen
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2 votes
I think the answer is B because it’s the same thing as the atomic number
User Antoine Mottier
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