How do you find out that a given molecule is ionic or covalent or both?

Answer 1

Generally, metals and nonmetals combine to form ionic compounds, and nonmetals combine to form molecules.

Answer 2

A molecule is ionic if it is composed of ions that are held together by electrostatic forces. These ions can be positively and negatively charged atoms or molecules. In contrast, a molecule is covalent when its atoms are held together by the sharing of electrons. Some molecules can exhibit both ionic and covalent characteristics, known as polar covalent bonds, where electrons are shared unevenly, leading to partial charges on atoms.