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Type: Multiple-Choice
Category: Periodic Table and Elements
Level: Grade 8
Score: 8
Author: jumcneill
Last Modified: 4 years ago

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Periodic Table and Elements Question

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Grade 8 Periodic Table and Elements

The atomic number of an atom is determined by the number of                .
  1. protons
  2. neutrons
  3. electrons
  4. isotopes
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