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Type: Multiple-Choice
Category: Periodic Table and Elements
Level: Grade 8
Author: frankthecoolguy
Last Modified: 18 days ago

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Periodic Table and Elements Question

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Grade 8 Periodic Table and Elements

The number of valence electrons in an atom is equal to the
  1. period number.
  2. group number.
  3. atomic mass.
  4. number of neutrons.
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