A molecular bond is a force of attraction between two or more atoms that holds them together to form a molecule.
A molecular bond is formed when two atoms share electrons in order to achieve a more stable electron configuration.
In a covalent bond, atoms share electrons, whereas in an ionic bond, one atom gives up an electron to the other atom.
In H2+, there is only one electron shared between the two hydrogen atoms, while in H2, there are two electrons shared between them.
The molecular bond in H2+ is important because it is the simplest example of a diatomic molecule and helps us understand the fundamentals of chemical bonding.