Question

Check the correctness of the following statements about Bohr model of hydrogen atom :

(i) the acceleration of the electron in n = 2 orbit is more than in n = 1 orbit

(ii)the angular momentum of the electron in n = 2 orbit is more than in n = 1 orbit

(iii) the KE of the electrón in n = 2 orbitislessthan in n = 1 orbit

• A. All the statements are correct
• B. Only (i) and (ii) are correct
• C. Only (ii) and (iii) are correct
• D. Only (iii) and (i) are correct

Answer 1

Answer: (C)

Only (ii) and (iii) are correct

Answer 2

(i) a = $\frac{v^{2}}{r} \propto \frac{Z^{2}}{n^{2}} \times \frac{Z}{n^{2}}$ Ž a $\propto \frac{Z^{2}}{n^{4}}$

(ii) L = mvr = $\frac{nh}{2\pi}$ Ž L µ n

(iii) KE = $\frac{1}{2}\frac{KZe^{2}}{r}$Ž KE µ$\frac{1}{r}$ Ž KE µ $\frac{1}{n^{2}}$