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Combined Science994 views·Updated 2 Aug 2026Atomic Mass and Number Calculations
Calculate the number of protons, neutrons, and electrons for different elements using atomic and mass numbers.
What does the atomic number of an element represent?
- What does the atomic number of an element represent? — The number of protons
- How is the mass number of an atom calculated? — Protons plus neutrons
- An atom of Sodium has an atomic number of 11 and a mass number of 23. How many neutrons does it have? — 12 neutrons
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