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Type: Multiple-Choice
Category: Periodic Table and Elements
Level: Grade 9
Author: swiftadam81
Last Modified: a month ago

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Periodic Table and Elements Question

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Grade 9 Periodic Table and Elements

Which of the following elements are in the same period?
  1. Kr, Zn, Ag, Cl
  2. Be, C, N, O
  3. Na, Mg, Al, Ne
  4. He, Ne, Ar, Kr
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