How can you tell a covalent molecule?

Answer 1

When a covalent bond occurs between elements, there is only involved nonmetals and metalloids. Covalent molecules will only contain nonmetals and metalloids. Covalent bonds are also formed by multiple atoms sharing electrons, so the substance will have a relatively low melting point.

Answer 2

A covalent molecule is formed when atoms share electrons to complete their outer electron shells. These molecules typically consist of nonmetals bonded together. They have relatively low melting and boiling points, and can be either polar or nonpolar depending on the electronegativity of the atoms involved.