Question

find wavelength of emitted radiation when electron of helium ion transist from 3 energy level to 1 energy level​

Answer 1

Answer:

33324455

Explanation:

45454545454

Answer 2

Given:

n₁ = 3

n₂ = 1

To Find:

The wavelength of emitted radiation when electron of helium ion undergoes a transition from 3rd to 1st energy level.

Calculation:

- For Helium, Z = 2

- The energy change is given as:

ΔE = E1 - E2

⇒ hc/λ = -2.18 × 10⁻¹⁸ × Z² × {(1/n₁²) - (1/n₂²)}

⇒ 6.63 × 10⁻³⁴ × 3 × 10⁸ /λ = -2.18 × 10⁻¹⁸ × 2² × {(1/3²) - (1/1²)}

⇒ 19.89 × 10⁻²⁶ /λ = 8.72 × 10⁻¹⁸ × 8/9

⇒ λ = 19.89 × 10⁻²⁶× 9 / 8.72 × 10⁻¹⁸ × 8

⇒ λ = 2.566 × 10⁻⁸ m

⇒ λ = 2566 × 10⁻⁹ m

⇒ λ = 2566 nm

- So, the wavelength of emitted radiation when electron undergoes transition from 3rd to 1st state is 2566 nm.