Answer:
D 4,3,2
Explanation:
4 Co + 3 O2 ----> 2 Co2O3
A) It decreases because the distance between the nucleus and outermost shell increases
An exothermic process is one that gives off heat.
Explanation:
This heat is transferred to the surroundings. An endothermic process is one in which heat has to be supplied to the system from the surroundings.
