What type of compound is formed from a Non-Metal and another Non-Metal?

When a non-metal combines with another non-metal, the compound formed is best categorized as a covalent molecular compound. This is because non-metals tend to have similar electronegativities, which allows them to share electrons rather than transfer them as seen in ionic compounds.

In covalent molecular compounds, the sharing of electrons leads to the formation of distinct molecules characterized by specific ratios of the atoms involved. For example, in water (H₂O), two hydrogen atoms share electrons with one oxygen atom, creating a stable molecular structure through covalent bonding.

The other types of compounds mentioned, such as ionic compounds, involve the transfer of electrons from a metal to a non-metal, typically resulting in the formation of ions. Metal complexes refer to compounds where metal ions bond with molecules or ions called ligands, generally not involving non-metals alone. Acids can sometimes consist of non-metals, but they often involve specific arrangements that do not fit under the broader category of covalent molecular compounds. Thus, the formation of a compound exclusively from non-metals aligns precisely with the characteristics of covalent molecular compounds.