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 |