Final answer:
Molecular or covalent compounds are made up of two or more different nonmetal elements bonded by sharing electrons. Examples include water (H₂O), carbon dioxide (CO₂), and ammonia (NH₃), which all exhibit properties like low boiling points and poor electrical conductivity.
Step-by-step explanation:
A molecular compound, also known as a covalent compound, is composed of molecules formed by atoms of two or more different nonmetal elements. These atoms come together to share pairs of valence electrons through covalent bonds. A molecule is the smallest particle of a covalent compound that retains the compound's properties. Covalent compounds include substances like water (H₂O), carbon dioxide (CO₂), and ammonia (NH₃). Each of these compounds is made up of nonmetals only, indicating that they are indeed molecular compounds. They exhibit certain features such as low boiling points, inability to conduct electricity, and limited solubility in water. Additionally, when naming simple covalent compounds, certain rules apply such as using prefixes to indicate the number of atoms and adding 'ide' to the second element named.