What is the bond order of the $O_2$ molecule?

Write the electron configuration,bond order,and magnetic property of the hydrogen $(H_2)$ molecule.

Which of the following statements is correct for the peroxide ion $(O_2^{2-})$?
$A.$ It has completely filled $\pi^*$ antibonding molecular orbitals.
$B.$ It is diamagnetic.
$C.$ It has a bond order of one.
$D.$ It is isoelectronic with Neon.

The bond order of $O_2^{+}$ is $x$. The bond orders of $O_2^{-}$ and $O_2^{2+}$ are respectively

Provide the electron configuration,magnetic property,bond order,and energy level diagram for the carbon molecule $(C_2)$.

Which one of the following sketches is not correctly matched?