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Type: Multiple-Choice
Category: Periodic Table and Elements
Level: Grade 9
Score: 25
Author: swiftadam81
Last Modified: a year ago

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Periodic Table and Elements Question

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Grade 9 Periodic Table and Elements

Which term refers to the number of protons in an atom and helps to place elements on the Periodic Table?
  1. atomic number
  2. atomic mass
  3. mass number
  4. isotope
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