Question

The amount of energy required to ttansfar electron ist orbit of hydrogen to 3rd orbit?

Answer 1

We have, Energy of the electron in n_th orbit of hydrogen atom is given by E_n = −13.6/n²eV.

For n=1, E₁=−13.6/(1)²=−13.6 eV

and for n = 3, E₃=−13.6/(3)²=−1.51 eV

So required energy = E3−E1=−1.51−(−13.6) = 12.09 eV