In a mixture of H – He + gas (He + is singly ionized He atom), H atoms and He + ions are…
Chemistry · JEE Advanced · NTA Exams — Atomic Structure
In a mixture of H – He+ gas (He+ is singly ionized He atom), H atoms and He+ ions are excited to their respective first excited states. Subsequently, H atoms transfer their total excitation energy to He+ ions (by collisions). Assuming that the Bohr model of atom is applicable, answer the following questions.
The wavelength of light emitted in the visible region by He+ ions after collisions with H atoms is : (in Å)
In visible region Balmer series \(e^{\odot}\)has to come from n\(n=4 \text { to } \mathrm{n}=2\)
- 6.5 × 10–7 m
- 5.6 × 10–7 m
- 4.8 × 10–7
- 4.0 × 10–7 m
Answer
(C) 4.8 × 10 –7
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