The figure shown above shows the energy levels for the hydrogen atom. What is the energy of the photon emitted when the electron in a hydrogen atom drops from the energy level E5 to energy level E2?
Please show work in guess method if possible. ( givens, unknown, equation, substitute, solve )

First answer marked as brainiest which is the correct equation describing the first law of thermodynamics? a) when the internal energy of a system changes, it equals the amount of heat added plus the work done. b) when work is done by the piston, it is equal to the heat added plus the change in internal energy of the system. c) when heat is added to the system, it is equal to the amount of work done by the piston plus the change in internal energy of the system.