An electron in a hydrogen atom drops from an excited energy state n = 5 to a less excited energy state n = 2, and in the process it emits a blue photon with wavelength 434 nm. what is the energy difference between these two states within the hydrogen atom? you may assume the emission of the photon occurs in a vacuum.

Complete the statement about memory improvement. ( )involves organizing and breaking down information into easier groups to expand capacity. rehearsal is the verbal repetition of information. these techniques are especially important for the improvement of ( ) memory.

What happens when the number of protons in an atom changes

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.