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Type: Multiple-Choice
Category: Periodic Table and Elements
Level: Grade 10
Author: teachchemistry
Last Modified: 7 years ago

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Periodic Table and Elements Question

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Grade 10 Periodic Table and Elements

Which of the following distinguishes an alkaline earth metal from an alkali metal?
  1. The atomic number
  2. The mass number
  3. The number of protons
  4. The number of valence electrons