Few Important Questions

1. Calculate the wavenumber and frequency for the below:

Yellow light emitted from a sodium lamp has a wavelength (λ) of 580 nm

2. Calculate and provide the number of electrons for the following:

1. H⁺₂
2. O⁺₂
3. H₂

3. Calculate the wavelength using the following details:

Mass of electron is 9.1 × 10^–31 kg and K.E. is 3.0 × 10^–25 J