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Type: Multiple-Choice
Category: Periodic Table and Elements
Level: Grade 10
Author: abrown1201
Last Modified: 18 days ago

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Periodic Table and Elements Question

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Grade 10 Periodic Table and Elements

Noble gases are unreactive because they have a full shell of                      .
  1. inner-level electrons
  2. protons
  3. valence electrons
  4. neutrons
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