Looking at a potential energy diagram what is the name given to represent the amount of energy given off during an exothermal reaction? Released energy
Stored energy
Activation energy
Free energy

The chemical equation below shows the reaction of sodium (na) and chlorine (cl) to form sodium chloride (nacl). 2na + cl2 → 2nacl in this equation, which of the following is a reactant? i. sodium ii. chlorine iii. sodium chloride