Which of the following transitions represent the emission of a photon with the largest energy?

How much energy does the electron have initially in the n=4 excited state

Consider a hydrogen atom in the ground state. What is the energy of its electron?

Is energy emitted or absorbed when the following electronic transitions occur in hydrogen? a. from n = 4 to n = 2

Is energy emitted or absorbed when the following electronic transitions occur in hydrogen? b. from an orbit of radius 2.12 Å to one of radius 8.46 Å

Indicate whether energy is emitted or absorbed when the following electronic transitions occur in hydrogen: a. from n = 3 to n = 6