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Type: Multiple-Choice
Category: Periodic Table and Elements
Level: Grade 11
Score: 2
Author: Ms_VThomas
Last Modified: a month ago

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Periodic Table and Elements Question

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Grade 11 Periodic Table and Elements

What were the last two types of elements to be added to the Periodic Table?
  1. halogens and noble gases
  2. alkali metals and alkaline metals
  3. inertia and gases
  4. hydrogen and peroxide
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