What experimental evidence requires that the emission of energy by an atom must be quantized.

The process requiring absorption of energy is

What is the energy in joules required to shift the electron of the hydrogen atom from the first Bohr orbit to the fifth Bohr orbit and what is the wavelength of the light emitted when the electron returns to the ground state? The ground state electron energy is -2.18xx10^(-11) ergs. (1erg=10^(-7)J)

The bond energy is the energy required to

Why is energy required to develop root pressure?