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Type: Multiple-Choice
Category: Periodic Table and Elements
Level: Grade 9
Score: 1
Author: JenKrause
Last Modified: 6 months ago

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Periodic Table and Elements Question

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Grade 9 Periodic Table and Elements

Mendeleev arranged the elements in his Periodic Table in order of
  1. increasing atomic mass.
  2. increasing number of electrons.
  3. increasing atomic number.
  4. increased number of neutrons.
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