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A molecule or compound is made when two or more atoms form a chemical bond, linking them together. The two types of bonds are ionic bonds and covalent bonds. In an ionic bond, the atoms are bound together by the attraction between oppositely-charged ions. For example, sodium and chloride form an ionic bond, to make NaCl, or table salt. In a covalent bond, the atoms are bound by shared electrons. If the electron is shared equally between the atoms forming a covalent bond, then the bond is said to be nonpolar. Usually, an electron is more attracted to one atom than to another, forming a polar covalent bond. For example, the atoms in water, H2O, are held together by polar covalent bonds. Do you understand? Test your comprehension with this quiz.
More Chemistry FAQs
A covalent bond is the chemical bond that involves the sharing of pairs of electrons between atoms where the ionic bond is just formed through an electrostatic attraction.
the two answers above are both right but but rahul's is the simplest,