Binary molecular compounds are composed of two nonmetals.

Here's why:

* Metals tend to lose electrons and form positive ions (cations).

* Nonmetals tend to gain electrons and form negative ions (anions).

* Ionic compounds are formed by the electrostatic attraction between oppositely charged ions (metal and nonmetal).

* Molecular compounds are formed by the sharing of electrons between nonmetals. This sharing creates covalent bonds.

Examples of Binary Molecular Compounds:

* Water (H₂O)

* Carbon dioxide (CO₂)

* Ammonia (NH₃)

* Methane (CH₄)

Let me know if you have any other questions!