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Chemical Elements

Fermium

Fm 100

A synthetic element named after Enrico Fermi.
Fermium is a synthetic element with the symbol Fm and atomic number 100. It belongs to the actinide series on the periodic table and is classified as a radioactive metal. Fermium was first produced in the early 1950s and has no significant commercial applications due to its scarcity and highly radioactive nature.
Symbol
Fm
Atomic number
100
Atomic mass
257
Classification
Actinides
Melting point
1527°C
Boiling point
Unknown
State of matter
Solid
Appearance
Silvery-white
Discovery and history
Fermium was discovered in 1952 by a team of American scientists who were studying the results of a hydrogen bomb explosion during Operation Ivy at the Eniwetok Atoll in the Marshall Islands. The team included prominent chemists Albert Ghiorso, Glenn T. Seaborg, and the late Emilio Segrè. They isolated fermium from the debris of the explosion and initially identified it as element 100 through a series of chemical separation processes. The discovery was significant not only for confirming the existence of heavy elements but also for providing insights into the complex processes occurring in nuclear reactions. The element was named in honor of the Italian-American physicist Enrico Fermi, who made fundamental contributions to the development of nuclear physics.
Natural occurrence
Fermium is not found in nature in significant amounts due to its highly radioactive nature and rapid decay. It can only be produced artificially in particle accelerators or nuclear reactors. In extremely trace amounts, fermium can be found in the debris of nuclear explosions, as well as in the waste produced by certain nuclear reactors. As such, it is classified as a synthetic element, which means it does not occur naturally in the Earth's crust and must be created through nuclear reactions involving lighter elements.
Biological role and importance
Fermium has no known biological role and is not considered to be essential for any biological processes. Its radioactivity and toxicity pose significant health risks, which is a primary reason why it is not utilized in medicine or biological studies. The element's lack of occurrence in nature and limited production means there is virtually no research regarding its effects on living organisms. As such, it is primarily of interest in the realm of nuclear chemistry and physics rather than in biological sciences.
Physical and chemical properties
Fermium is classified as an actinide metal and is known to be a radioactive element. It has a silvery appearance and forms a dense metallic structure. The element has an atomic mass of approximately 257 atomic mass units and a somewhat unstable isotopic profile, with its most stable isotope, fermium-257, having a half-life of about 100.5 days. Fermium exhibits typical metallic properties, such as conductivity and malleability, although there is limited data due to its scarcity. Chemically, fermium reacts with oxygen and halogens, forming oxides and halides, similar to other elements in its group.
Uses and applications
Due to its scarcity and high radioactivity, fermium has limited practical applications. It is primarily used for research purposes in nuclear science, particularly in studies relating to the synthesis of heavier elements and the understanding of actinide properties. Specialized applications may include the synthesis of new isotopes and the exploration of nuclear reactions at the atomic level. Fermium is not used in consumer products and remains a subject of academic interest rather than commercial exploitation.
Did you know?
  • Fermium was the first element to be artificially synthesized in significant quantities, specifically through nuclear explosion debris.
  • The name fermium recognizes Enrico Fermi, who is often dubbed the 'father of nuclear physics' for his pivotal contributions.
  • Despite its radioactive properties, studying fermium allows scientists to gain insights into the behavior of heavy elements under extreme conditions.