The table compares the type of reactants and products taking part in two chemical changes.

chemical change comparison

chemical reaction reactants products

x an element and a compound a compound

y an element and another element a compound

which of the following statements correctly identifies the synthesis reaction and explains why?

only chemical reaction x, because one reactant is a compound

only chemical reaction y, because both reactants are elements

neither chemical reaction x nor y, because they have only one product

both chemical reactions x and y, because there are two reactants and a single product