Question

what is the formula to find emission lines when an electron jumps from energy level n2 to n1​

Answer 1

Answer:

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