A compound of gallium with chlorine has a melting point of 77°C and a boiling point of 201°C. Is the compound ionic or covalent? What is a likely formula?

Ionic compounds are formed when electrons are transferred from one atom to another, resulting in charged ions that attract each other. They typically have high melting and boiling points due to strong electrostatic forces. In contrast, covalent compounds involve the sharing of electrons between atoms, leading to lower melting and boiling points. Understanding these differences is crucial for determining the nature of the gallium-chlorine compound.

The melting point is the temperature at which a solid becomes a liquid, while the boiling point is the temperature at which a liquid becomes a gas. High melting and boiling points often indicate strong intermolecular forces, which are characteristic of ionic compounds. In this case, the compound's melting point of 77°C and boiling point of 201°C suggest significant bonding interactions, which can help identify its nature.

A chemical formula represents the types and numbers of atoms in a compound. For gallium and chlorine, gallium typically forms a +3 ion (Ga³⁺) and chlorine forms a -1 ion (Cl⁻). The likely formula for the compound would be GaCl₃, indicating that three chloride ions balance one gallium ion, which is consistent with the properties of ionic compounds.