What happens when a sodium ion is attracted to a chlorine ion? a. they form a covalent bond. b. they form a molecule. c. they form a liquid. d. they form an ionic compound?

Which of the following describes a situation where competition between producers exists

Which substance—wood or silver—is the better thermal conductor? a thermal conductor is a material that requires very little heat energy to change its temperature. explain your answer.

Which of the following occurs along coasts during the day?