Exam 29: Nuclear Physics: Part A

The wavelength of a coherent laser is 628 nm.What energy difference exists between the upper excited state involved and the lower unexcited ground state? (h = 6.63 × 10−³⁴ J⋅s,c = 3.00 × 10⁸ m/s,1 eV = 1.60 × 10−¹⁹ J,and 1 nm = 10−⁹ m)

The ionization energy for the hydrogen atom is 13.6 eV.What is the energy of a photon that is emitted as a hydrogen atom makes a transition between the n = 4 and n = 3 states?

How many electrons are in chlorine's (atomic number 17)next to outer shell (n = 2)?