Question

covalent substances generally have lower melting points than ionic substances. which analysis correctly explains these properties? clear all ionic bonds are stronger than intermolecular forces in covalent substances. ionic bonds are stronger than intramolecular forces in covalent substances. ionic bonds are weaker than intermolecular forces in covalent substances. ionic bonds are weaker than intramolecular forces in covalent substances.

Explanation:

Covalent substances like sugar have lower melting - points than ionic substances like salt because ionic bonds are stronger than intermolecular forces in covalent substances. Ionic bonds are electrostatic attractions between ions, while covalent substances are held together by weaker van der Waals forces and hydrogen bonds (in some cases). Breaking the strong ionic bonds in ionic substances requires more energy (higher melting - point), while breaking the weaker intermolecular forces in covalent substances requires less energy (lower melting - point).

Answer:

Ionic bonds are stronger than intermolecular forces in covalent substances.