Question 30

Radius of a certain orbit of hydrogen atom is $$8.48 \text{ Å}$$. If energy of electron in this orbit is $$E/x$$, then $$x =$$ _______ (Given $$a_0 = 0.529 \text{ Å}$$, $$E =$$ energy of electron in ground state).

Correct Answer: 16

$$r_n = n^2 a_0$$. Given $$r = 8.48$$ Å: $$n^2 = 8.48/0.529 = 16 \Rightarrow n = 4$$.

$$E_n = E/n^2 = E/16$$. So $$x = 16$$.

The answer is 16.

Create a FREE account and get:

Download resources