👉 Reactivity is a concept in chemistry that describes how two substances react with each other to form new compounds. In other words, it refers to the ability of one substance to interact with another substance and produce a product. This can be described as a chemical reaction, where the atoms or molecules involved in the reaction come together to form new compounds. The term "reactivity" is often used to describe how two substances react with each other, but it can also refer to the overall process of chemical reactions
