Final answer:
The bond between hydrogen and chlorine atoms in hydrochloric acid is a covalent bond, formed by the sharing of electrons between nonmetals.
Step-by-step explanation:
The type of bond formed between the hydrogen and chlorine atoms in a molecule of hydrogen chloride is a covalent bond. This bond happens because both hydrogen (H) and chlorine (Cl) are nonmetals, and when nonmetals combine, they typically share electrons to fill their outer electron shells. According to the relative positions of hydrogen and chlorine in the periodic table, they are more likely to share electrons rather than one completely losing and the other gaining an electron, which would be the case in an ionic bond. Therefore, the correct option is b. Covalent bond.