Chemical abundance is a research area that focuses on the study of the relative amounts of various elements and compounds present in a particular environment, such as in the atmosphere, oceans, or in living organisms. Researchers in this field use analytical techniques to quantify the concentrations of different chemical elements and compounds, and investigate their distribution and interactions within natural systems. Understanding chemical abundance is essential for studying the biogeochemical cycles of elements, assessing environmental pollution, and exploring the composition of celestial bodies such as planets and stars.