MCQ
Which of the following has minimum bond length?
- A$\text{O}_2$
- ✓$\text{O}^+_2$
- C$\text{O}^-_2$
- D$\text{O}^{2-}_2$
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| Energy level | $K$ | $L$ | $M$ | $N$ |
| $n=1$ | $n=2$ | $n=3$ | $n=4.....n=\infty$ | |
| Energy | $- 864 \,a.u.$ | Zero |
the excitation energy needed to raise the electron from $M$ level to $n = \infty$ would be :


