posted by Kelsey .
When a sodium atom absorbs light at 330.2 nm, the 3s electron is promoted to the 4p level. How much energy would be required for ionization once the electron is in the 4p level?
E1 = energy to promote from 4s to 4p = hc/wavelength. Remember to convert mm to m.
E2 = energy to promote from 4s to infinity = 2.18E18(1/4^2 - 0)
E2-E1 = energy to promote from 4p to infinity.