Why do compounds form in nature?

Which best describes why nh4+ can form an ionic bond with ci-?

Voltaic cells produce a positive overall charge. what does this indicate? a. the reaction is likely to be endothermic. b. the reaction is spontaneous. c. the reaction is not likely to occur. d. the reaction is not spontaneous.

Fred is studying a substance that is made out of only one element. this means that