LI-6 Decomposition reactions

Question 1

what is a synthesis reactions?

Answer 1

when multiple reactants combine to make a single product

X+Y=XY
eg
carbon+oxygen=carbondioxide

Question 2

what is a decomposition

Answer 2

when chemical bonds holding different atoms in a compound together are broken
XY=X+Y
EG
calcium carbonate=calcium oxide +carbon dioxide