Definition - What does Reactivity mean?
Reactivity is the rate at which a chemical substance undergoes a chemical reaction. The chemical reaction can be of a single substance or of two substances which interact with another. It is the systematic study of the reactions of these substances and can also be termed as a methodology employed to the study of the reactivity of all chemicals types. The chemical reactivity of substances can be referred to the variety of conditions including pressure, temperature and the presence of catalysts in which the substances react in a blend with various substances, equilibrium point of the reactions and the rate of the reactions.
Petropedia explains Reactivity
Reactivity embodies both the kinetic and thermodynamic factors, which actually varies, but both depend on temperature. In the case of pure compounds it is regulated by physical properties. A chemical reaction, in thermodynamics, takes place due to the products being at low free energy. The lower state of energy is the more stable state.
Fluorine is an element with the highest reactivity as a stream of fluorine gas can ignite a concrete block spontaneously at room temperature. Other elements with higher reactivity are francium and cesium. Helium is an element with the lowest reactivity that forms no compound. Other elements with low reactivity are platinum and gold.