Elemental Abundance refers to the availability and distribution of chemical elements in the universe. It is often expressed in terms of the relative proportions of elements found in stars, planets, and other celestial bodies. For example, elements like hydrogen and helium are the most abundant, making up about 98% of the observable universe, while heavier elements like carbon and oxygen are less common but essential for life. Understanding Elemental Abundance helps scientists study the formation and evolution of the universe. By analyzing the composition of celestial objects, such as stars and galaxies, researchers can gain insights into processes like nucleosynthesis, which explains how elements are created in stellar environments.