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If you had a mole of electrons and a mole of protons and put them together, they would make hydrogen. The transition from ions to ground-state atoms would release 13.6 eV/atom or about 1300 kJ/mol. This mole of hydrogen would have a mass of one gram. For comparison, combustion of 1 kg of gasoline releases about 44 MJ of heat; your completely-ionized ...


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I assume that what you're getting at is something like "what would it look like if we created something the size and mass of a basketball, made of only neutrons?" If this is what you're getting at, you should consider what is meant by what something "looks like". This generally means how does visible wavelength light interact with it? A regular basketball ...


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Yes, a sufficiently massive neutron star can prevent collapse to a black hole, up to a point. The most massive neutron stars are thought to be spinning very rapidly, and they exceed the mass of the theoretical limit of a non-rotating neutron star. However, most models predict that a neutron star couldn't spin much faster than 1 kHz because they would break ...



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