Question

The ionization energy of per mole of hydrogen atom in terms of Rydberg constant (R_H) is given by the expression

• A. R_Hhc
• B. R_Hc
• C. 2 R_Hhc
• D. R_H N_Ahc

Answer 1

Answer: (D)

R_H N_Ahc

Answer 2

$\frac{1}{\lambda}$ = R_H $\left( \frac{1}{n_{1}^{2}} - \frac{1}{n_{2}^{2}} \right)$

For ionization of H-atom , n₁ = 1 and n₂ = 

\ $\frac{1}{\lambda}$ = R_H and IE = N_A $\frac{c}{\lambda}$× h = R_H N_A hc