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Type: Multiple-Choice
Category: Periodic Table and Elements
Level: Grade 10
Author: MadamTess2020
Created: a year ago

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Periodic Table and Elements Question

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Grade 10 Periodic Table and Elements

The sum total of protons and neutrons in an atom is referred to as the                .
  1. atomic number
  2. atomic mass
  3. mass number
  4. molar mass
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