which is produced in a synthesis reaction?\n○ a single element\n○ a single compound\n○ a single ion\n○ a…

Brief Explanations:

A synthesis reaction is a type of chemical reaction where two or more reactants combine to form a single product. The general form is ( A + B \rightarrow AB ), where ( AB ) is a compound. Elements combine to form compounds in synthesis reactions, so the product is a single compound. A single element, ion, or atom is not typically the product of a synthesis reaction (as synthesis involves combining substances to form a more complex substance, usually a compound).

Answer:

a single compound