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1 vote
There are eight protons in an oxygen atom and one proton in a hydrogen atom. What are these number called?

A: periodic table
B: mass number
C: atomic number

asked
User DMM
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2 Answers

6 votes
I agree it is C. Atomicnumber
answered
User Eugeniu Torica
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8.2k points
4 votes
atomic number, its the little number to the top right in the little box in your periodic table
answered
User Leo Zhu
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8.3k points

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