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

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Periodic Table and Elements Question

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Grade 10 Periodic Table and Elements

The atomic number of an atom is always equal to
  1. the number of neutrons
  2. the number of electrons
  3. the number of protons
  4. the number of protons plus neutrons
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