What type of reactant typify compostion reactions?

You need to clarify your question for me. I haven't heard of composition rreactions. Perhaps I know it by another name.

In the real world, there is no "typical" reactant in composition reactions.

In the construct world of first year chemistry, one often sees elements in composition (synthesis) reactions:

Na + Cl >>>NaCl

To determine the reactants typically involved in composition reactions, we need to clarify the question.

In chemistry, composition reactions, also known as synthesis reactions, involve the combination of two or more substances to form a single product. These reactions can occur between elements, compounds, or a combination of both.

If we focus on elemental composition reactions, they involve the combination of elements to form a compound. For example, the reaction between sodium (Na) and chlorine (Cl) to form sodium chloride (NaCl) is a composition reaction:

Na + Cl → NaCl

In this reaction, sodium and chlorine combine to form sodium chloride. Sodium and chlorine are the reactants, and sodium chloride is the product.

However, it is important to note that composition reactions can involve compounds as well. In these cases, the reactants would be the compounds themselves, rather than individual elements.

Overall, the reactants in composition reactions can vary widely depending on the specific reaction being studied. It is always important to consider the specific reaction equation to identify the reactants involved.