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Type: Multiple-Choice
Category: Periodic Table and Elements
Level: Grade 9
Score: 5
Author: JVance
Last Modified: 11 months ago

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Periodic Table and Elements Question

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Grade 9 Periodic Table and Elements

Elements in the same period have the same number of                  .
  1. protons
  2. neutrons
  3. energy levels
  4. valence electrons
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