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An element's atomic number tells you the number of which particle in its atoms?

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  1. Neutrons
  2. Electrons in the outer shell
  3. Protons in the nucleus

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References

  1. OpenStax Chemistry 2e, 2.3 Atomic Structure and Symbolism openstax.org/books/chemistry-2e/pages/2-3-atomic-structure-and-symbolism Checked 2026-10-12.

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