A nail rusts when the iron in the nail reacts very slowly with oxygen to form a new substance and heat. this is an example of a(n) ________ reaction.
a. fusion
b. fission
c. exothermic
d. endothermic
It's a FUSION reaction because Iron and Oxygen react together to make Iron Oxide (rust) and it's EXOTHERMIC because the reaction forms heat (stated above), which means it's releasing energy.
