According to molecular theory, the species among the following that does not exist is
$He _{2}^{+}$
$He _{2}^{-}$
$Be _{2}$
$O _{2}^{2-}$
The bond order of $O_2^ + $ is the same as in
Which of the following is paramagnetic
Identify a molecule which does not exist.
Give difference : Bonding molecular orbital and antibonding molecular orbitals.
"Isoelectronic molecules and ions have identical bond orders." Explain by examples.