Let's define an ionic and covalent bond. An ionic bond occurs between a metal and non-metal. These electrons are transferred between atoms. A Covalent bond occurs between a nonmetal and a nonmetal. These electrons are shared between atoms. First, identify whether each element is metal or nonmetal. If you need a little help, refer to an online periodic table for guidance. We see that both Hydrogen and Sulfur are nonmetals. That eliminates both choice 1 and 3. Then, understanding that within covalent bonds, electrons are shared, choice 4 is eliminated. Thus, the answer is 2.
