Two physicists discovered special properties of stable atoms with 'magic numbers' of protons and neutrons 75 years ago
In Bohr's model, if an electron orbit is not already ... Tin always has 50 protons, and its most common isotope has 70 ...
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Atomic and nuclear physics
Change the number of neutrons in an atom and it becomes an isotope, change the number of electrons, it becomes an ion! Learn more about atoms and the Rutherford-Bohr model of an atom in this CCEA ...