i’m pretty sure 5 valence electrons
Answer:
2Al + Fe2O3 >>> 2Fe + Al2O
Answer:
Energy is absorbed in the form of heat. so the reaction is
ENDO (COMES IN)-THERMIC (HEAT)
Explanation:
What must occur in order for a chemical reaction to be specifically classified as endothermic instead of exothermic?
Atoms are rearranged.
Chemical bonds are formed.
Energy is released in the form of heat.
Energy is absorbed in the form of heat.
The answer to your question would be D) chemical bonding because when you are bonding atoms to each other you are creating a new and unique substance