Important elements

Abstract

Which chemical elements are most important? In intmductory chemistry, which elements should be studied? In advanced courses, which elements should receive most attention? I hope to answer these questions in this paper.The importance of an element is, of course, relative, depending entirely on thecontext in which it is assessed. An element that is very important from one point of view may be quite unimportant from another. Moreover, the value of anelement, inone context, is somewhat subjective, depending on your criterion.I will trv to reduce the effects of relativitv and subiectivitv by considering the elements in a variety i f context; and b; . seeking rational measures of their relative im~ortance. I -then merge the results for the different contexts to rank the clementsin orderofimoonanceoverall. Whileconsiderable subjectivity remains the final list, I hope that it will nevertheless be useful to educators and instructors in deciding how to divide attention among different elements.Natural Importance For people, the most important parts of the universe are the earth and the sun, which supplies the earth with energy.

Generation of Vanadium Oxide Quantum Dots with Distinct Fluorescence and Antibacterial Activity via a Room‐Temperature Agitation Strategy

“…Thereinto, iron ion (Fe 3+ ) is aubiquitous but vital metal in biochemical processes, such as cell metabolism, electron transfer, enzymatic catalysis and oxygen transport . The excess or deficiency of Fe 3+ can result in the physical illness like anemia, mental decline, arthritis, diabetes, cancer and so on . In addition, phosphate species widely present in biological system and playvital roles in various important biological processes.…”

“…[35] The excess or deficiency of Fe 3 + can result in the physical illness like anemia, mental decline, arthritis, diabetes, cancer and so on. [36][37][38] In addition, phosphate species widely present in biological system and playvital roles in various important biological processes. As a hydrolysis product of adenosine triphosphate (ATP), PPi have caused particularly much attention not only because they involve in DNA polymerization, enzymatic reactions and cellular metabolism, but also are related to some severe medical conditions in term of their levels.…”

Two Lanthanide Metal–Organic Frameworks as Remarkably Selective and Sensitive Bifunctional Luminescence Sensor for Metal Ions and Small Organic Molecules

“…Besides, Fe 3+ is also a ubiquitous metal in biochemical processes such as cell metabolism, electron transfer enzyme catalysis, oxygen transport and synthesis of DNA and RNA. The excess or deficiency of iron ion can result in the physical illness like anemia, mental decline, arthritis, diabetes, cancer and etc. − On the other hand, with the rapid development of industry and the social activities of human beings, a great amount of toxic organic small molecules and heavy metal ions are released into the environment for human survival which have caused a lot of adverse effects to the environment and the health of human being. − …”

An Amine/Azine Functionalized MOF as a New Fluorescent Probe for Selective Sensing of Metal Ions

“…Metal ions play key roles in life and environment, and the detection of these metal ions is quite important. Iron is an important metal in industry [1]. Fe 3+ ion is one of the most essential elements for either humans or other living organisms on account of their significance in many biochemical processes and biological systems.…”