11 Protons, Electrons, Neutrons

Determine the Number of Protons, Electrons, and Neutrons in the following isotopes.

Remember where the numbers comes from:

Protons = Atomic Number

Electrons for Neutral Atoms = Atomic Number (Protons = Electrons)

Neutrons = Atomic Mass – Protons

Atomic Number 19 34 72 90
Element K Se Hf Th
Isotope Mass 40 79 180 232

 

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