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Frage 37

What particle count is represented by an element's atomic number Z?

  1. Neutrons only
  2. ProtonsRichtige Antwort
  3. Protons plus neutrons
  4. Electrons plus neutrons

Erklärung

Atomic number counts the protons in the nucleus and therefore fixes the element's identity. Adding neutrons gives a different quantity, the mass number, rather than Z.

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Frage 37: What particle count is represented by an element's atomic… · The Periodic Table and Elements · Questena