1. 720 J
2. 2.41 J
3. 24.12 J
4. 4.34 × 104 J
1. Aelectron
2. protons
3. H2+
4. neutrons
1. 75 V
2. 150 V
3. 100 V
4. None of these
1. unchanged
2. halved
3. doubled
4. quadrupled
Balmer gives an equation for wavelength of visible radiation of H– spectrum as \(\lambda=\frac{k n^{2}}{n^{2}-4}\). The value of k in terms of Rydberg’s constant R is
1. R
2. 4R
3. \(R \over 4\)
4. \(4 \over R\)