Question

Explain what happens when an electron moves from a lower energy level to a higher energy level. An electron needs 1.2eV of energy to jump from energy level 1 to energy level 2. Predict what would happen if the electrons receives 1.0eV of energy and explain why.

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Answer 1

From the literature we know that energy level of an electron varies directly with its principal quantum number.

lower energy quantum number means higher principal number and vice versa.

So when electron moves from lower energy level to a higher energy level it absorbs photon since it needs energy to do so.

If 1.2eV is required for transition, but if it receives only 1eV there will be no transition and enerrgy will not be absorbed. This is acoording to the resonance condition which is applicable for all atoms.

According to the resonance condition, a photon can only be absorbed by an electron if the energy of the photon corresponds to the energy difference between two energy levels. If the energy of the photon is less, it cannot be absorbed