The correct statement$(s)$ about $O _3$ is (are)

$(A)$ $O$ - $O$ bond lengths are equal.

$(B)$ Thermal decomposition of $O _3$ is endothermic.

$(C)$ $O _3$ is diamagnetic in nature.

$(D)$ $O _3$ has a bent structure.

Which of the following species have maximum number of unpaired electrons

Which of the following is diamagnetic

Number of molecules having bond order $2$ from the following molecule is. . . . . . .  $\mathrm{C}_2, \mathrm{O}_2, \mathrm{Be}_2, \mathrm{Li}_2, \mathrm{Ne}_2, \mathrm{~N}_2, \mathrm{He}_2$

What bond order does $O_2^{2 - }$ have

Bond order of ${O_2}$ is