In order to ionize a hydrogen atom in the n = 6 state, it requires 13.6 eV of energy. This is because the ionization energy of hydrogen decreases as you go down the periodic table. So, it takes less energy to ionize a hydrogen atom in the n = 1 state than it does in the n = 6 state.
Other related questions:
Q: What is the energy level of n 6?
A: The energy level of n=6 is -13.6 eV.
Q: How much energy is needed to ionize a hydrogen atom?
A: It takes 13.6 eV to ionize a hydrogen atom.
Q: How much energy is needed to ionize a hydrogen atom that is in the n 4 state?
A: The answer to this question depends on the definition of “ionization energy.” If we consider ionization energy to be the minimum amount of energy needed to remove an electron from an atom or molecule, then the ionization energy of a hydrogen atom in the n=4 state would be the energy of the n=4 state minus the energy of the n=5 state. However, if we consider ionization energy to be the energy required to completely remove an electron from an atom or molecule, then the ionization energy of a hydrogen atom in the n=4 state would be the energy of the n=4 state minus the energy of the n=∞ state.