a. Use Bohr's equation to calculate how much energy (in J) is needed to promote an electron from the H-atom ground state to the n = 4 level.
b. If a photon provides the energy in (a), what is its wavelength in nm?

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The Answer of a. Use Bohr's equation to calculate how much energy (in J) is needed to promote an electron from the H-atom ground state to the n = 4 level.
b. If a photon provides the energy in (a), what is its wavelength in nm?

A Use Bohr's Equation to Calculate How Much Energy (In