A nonpolar covalent bond is formed when two atoms of the same element share electrons equally. This means that the electrons are shared equally between the two atoms, and there is no separation of charge.

Here are some examples of molecules that contain nonpolar covalent bonds:

* H₂ (Hydrogen gas): Two hydrogen atoms share their single electron each, resulting in a nonpolar covalent bond.

* O₂ (Oxygen gas): Two oxygen atoms share two pairs of electrons, resulting in a nonpolar covalent bond.

* N₂ (Nitrogen gas): Two nitrogen atoms share three pairs of electrons, resulting in a nonpolar covalent bond.

* Cl₂ (Chlorine gas): Two chlorine atoms share one pair of electrons, resulting in a nonpolar covalent bond.

* Br₂ (Bromine liquid): Two bromine atoms share one pair of electrons, resulting in a nonpolar covalent bond.

* I₂ (Iodine solid): Two iodine atoms share one pair of electrons, resulting in a nonpolar covalent bond.

Note: While the above examples are all diatomic molecules (molecules made of two atoms), larger molecules can also contain nonpolar covalent bonds if the atoms involved are the same element and the electrons are shared equally.