Question

the energy of an electron the 3rd orbit of hydrogen atom is-e the energy of an electron in the first orbit willbe​

Answer 1

Answer:

According to Bohr's theory , energy of electron in nth orbit is inversely proportional to square of n² .

e.g.,\bold{\mathbb{E}\propto\frac{1}{n^2}}E∝n21 

given, energy of electron in 3rd orbit, E₃ = -E ---(1)

Let energy in 1st orbit is E₁

Then, E₁/E₃ = (3)²/(1)² = 9

E₁ = 9E₃ 

from equation (1), 

E₁ = -9E 

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