The ionization energy of a certain element is 352 kJ/mol.
(Ionization energy is the minimum energy required to remove an
electron from an atom. It is usually expressed in units of kJ/mol;
that is, it is the energy in kilojoules required to remove one mole
of electrons from one mole of atoms.) However, when the atoms of
this element are in the first excited state, the ionization energy
is only 166 kJ/mol. Based on this information, calculate the
wavelength of...