As per the Bohr model, the minimum energy (in eV) required to remove the electron from the ground state of a double ionised lithium ion (\(Z=3\)) is:
1. \(1.51\)
2. \(13.6\)
3. \(40.8\)
4. \(122.4\)
A hydrogen atom is in an excited state of principal quantum number \((n)\). It emits a photon of wavelength \((\lambda)\) when it returns to the ground state. The value of \(n\) is:
1. \(\sqrt{\frac{\lambda R}{\lambda R-1}}\)
2. \(\sqrt{\frac{(\lambda R-1)}{\lambda R}}\)
3. \(\sqrt{\lambda(R-1)}\)
4. None of these
1. \(\frac{\lambda}{3}\)
2. \(\frac{3\lambda}{4}\)
3. \(\frac{4\lambda}{3}\)
4. \(3\lambda\)
1. | \(4 \lambda_1=2 \lambda_2=2 \lambda_3=\lambda_4\) |
2. | \( \lambda_1=2 \lambda_2=2 \lambda_3=\lambda_4\) |
3. | \( \lambda_1=\lambda_2=4 \lambda_3=9\lambda_4\) |
4. | \( \lambda_1=2\lambda_2=3 \lambda_3=\lambda_4\) |