Question 253: Atoms & Nuclei

Question

The wavelength of the photon emitted by a hydrogen atom when an electron makes a transition from n = 2 to n = 1 state is :

Accepted Answer

$$\Delta$$E = 10.2 eV
$${{hc} \over \lambda }$$ = 10.2 eV
$$\lambda$$ = $${{hc} \over {(10.2)e}}$$
= $${{12400} \over {10.2}}\mathop A\limits^o $$
= 121.56 nm
$$ \simeq $$ 121.8 nm

Answer

194.8 nm

Answer

490.7 nm

Answer

913.3 nm

Answer

121.8 nm

Atoms & Nuclei

The wavelength of the photon emitted by a hydrogen atom when an electron makes a transition from n = 2 to n = 1 state is :

Choose the correct answer: