What do all of the elements in the Noble Gas family have in common (column 18/8A on the above periodic table below), use He, Ne and Ar to guide your answer ? Please include the term electron in your response. *

The nuclear potential that binds protons and neutrons in the nucleus of an atom is often approximated by a square well. imagine a proton conned in an innite square well of length 105 nm, a typical nuclear diameter. calculate the wavelength and energy associated with the photon that is emitted when the proton undergoes a transition from the rst excited state (n 2) to the ground state (n 1). in what region of the electromagnetic spectrum does this wavelength belong?