Suppose that an electron within a hydrogen atom moves from the fourth energy level to the second energy level. What is the wavelength of the photon emitted during this process?

One mole of hydrogen atoms have electrons drop from the energy level to the energy level. Determine the energy released.

Calculate the energy released as a photon when an electron falls from the energy level to the energy level.

An electron in a hydrogen atom falls from the level to the level. What is the energy of the photon emitted?

What is the difference in energy for a hydrogen atom with its electron in the ground state and a hydrogen atom with its electron in the state?

An electron collides with an atom, exciting an electron in the atom from it's ground state . The initial velocity of the incoming electron is and after the collision it has a velocity of . What is the energy of the excited electron in the atom after the collision in electron-volts?

How much energy would it take to raise an electron from the to the energy level of a hydrogen atom?