what is the formula to find emission lines when an electron jumps from energy level n2 to n1
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the argument available in standard nuclear physics textbooks followed internationally goes as follows,
Nature does not prefer either protons or neutrons while making nucleilight and lighter-middle mass nuclei generally have equal/roughly equal number of neutrons and protonsthese nuclei are also generally nearly sphericalas an element gets heavier, its atomic number - equal to the number of protons in the nucleus - increases
coulomb repulsion now becomes something to reckon withtherefore, intermediate mass and heavy nuclei invariably have N>Zso as to offset the disruptive effects of increased coulomb repulsiona larger number of neutrons provides the additional bindingat this point, the ‘liquid drop model of the nucleus
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