Question

What are the two parts of a chemical reaction?

Answer 1

Hint : A chemical reaction takes place when there is a change in the chemical properties of an element. A chemical reaction is expressed as an equation using symbols of each element.

Complete Step By Step Answer:
In a chemical reaction, chemical composition of a participating element or molecule changes. Chemical reaction is expressed as a chemical equation and involves symbols of the element or compounds used.
$A \to B$
There are two parts of a chemical equation. The participating elements or molecules in a chemical reaction are called reactants and are represented on the left side of the arrow $( \to )$ . The compound that forms after the changes in the participating reactants are called products. Products are represented on the right side of the arrow.

Additional Information:
In a chemical reaction, there can be single or multiple reactants and products. Many times, additional information about the reaction like phase of reactants and products, external factors like temperature, heat are also given. These things are usually written on or below the arrow of the chemical equation. Sometimes, there might be some mathematical coefficients written ahead of the part of reactants or products. These mathematical coefficients are used for balancing the chemical equation.

Note :
If possible, always try to write the balanced chemical reaction. In many chemical reactions, the arrow used in their equation might be different. If there is an element above the arrow then that means a catalyst is used for the reaction. Example: $A\xrightarrow{{Pt}}B$ . If there is a triangular shape above the arrow then it means that the reaction requires external heating. If there are two half arrows pointing in the opposite direction $(A \rightleftharpoons B)$ then it indicates that the reaction is reversible.