Question

The energy of an electron in the third orbit of hydrogen atom is _E .The energy of an electron in the first orbit will be

Answer 1

Answer:

Explanation:

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

e.g.,

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