Which term describes the unstable arrangement of the reacting particles as the reaction takes place? A.
reactants
B.
activation energy
C.
products
D.
energy of reaction
E.
activated complex

answer: option (d) is the correct answer.

explanation:

when a compound is split into different parts by the action of heat then it is known as thermal decomposition.

when is heated at high temperature then it rasults in the formation of magnesium oxide and carbon dioxide.

the reaction is as follows.