What of the following is characteristic of a metallic bond

List four observations that indicate that a chemical reaction may be taking place

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.

How many neutrons does an element have if its atomic number is 50 and its mass number is 166