What amount of energy is needed for an electron to jump from n = 1 to n = 3? (h = 6.626 x 10-34,1 eV = 1.6 x 10-19 J)

Suppose you recently discovered a hydrogen like element that has only one electron orbiting around a nucleus containing a proton and a neutron. You found the ground state energy of the electron to be -16 eV. What will be the energy of this electron when it is on the excited state shown in the sketch? Note that all other possible intermediate states are shown by dashed lines. Electron is here Ground state 1.0 eV 16 eV - 1.0 eV -4.0 eV 4.0 eV

How many photons are emitted per second from a semiconductor laser which emits 0.75 mW of light at a wavelength of 540 nm? O 239E+15 O 2.04E+15 O 2.85E+15 O 3.21E+15

The electron in a certain hydrogen atom has an angular momentum of 2.583×10−34 J.s. What is the largest possible magnitude for the z-component of the angular momentum of this electron? For accuracy, use h=6.626×10−34 J⋅s. find Number Units