Timeline for Why don't we have more elements?
Current License: CC BY-SA 3.0
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| Jan 9, 2016 at 16:10 | comment | added | Lewis Miller | There is another factor at play here as well. The strong force between a neutron and a proton is somewhat stronger than that between two neutrons or two protons (even discounting the electromagnetic repulsion). That means that for low atomic numbers the most stable isotopes are those with equal numbers of neutrons and protons. As the atomic mass increases the coulomb repulsion between protons becomes more important and the shielding effects of extra neutrons becomes more important as described above. | |
| Jan 9, 2016 at 5:17 | history | edited | anna v | CC BY-SA 3.0 |
clarification
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| Jan 9, 2016 at 5:02 | history | answered | anna v | CC BY-SA 3.0 |