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Type: Multiple-Choice
Category: Periodic Table and Elements
Level: Grade 10
Author: Qalam
Last Modified: 2 years ago

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Periodic Table and Elements Question

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Grade 10 Periodic Table and Elements

The atomic number of an element is same as the number of
  1. protons.
  2. neutrons.
  3. protons + electrons.
  4. protons + neutrons.
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