WebElements Periodic Table » Californium (original) (raw)
Californium - 98Cf: the essentials
Name: californium
Symbol: Cf
Atomic number: 98
Relative atomic mass (_A_r): [ 251 ] (longest lived isotope)
Standard state: solid at 298 K
Appearance: unknown, but probably metallic and silvery white or grey in appearance
Classification: Metallic
Group name: Actinoid
Period in periodic table: 7 (actinoid)
Shell structure: 2.8.18.32.28.8.2
CAS Registry: 7440-71-3
Californium atoms have 98 electrons and the shell structure is 2.8.18.32.28.8.2. The ground state electronic configuration of neutral californium is [Rn].5f10.7s2 and the term symbol of californium is 5I8.
Californium: description
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Californium is a radioactive rare earth metal named after the state of California and the University of California (USA). Californium-252 is a strong neutron emitter and one microgram emits 170 million neutrons per minute, making it a biological hazard. It has a few specialised uses but only a few of its compounds are known.
Californium: binary compounds
Binary compounds with halogens (known as halides), oxygen (known as oxides), hydrogen (known as hydrides), and other compounds of californium where known.
Californium: compound properties
Bond strengths; lattice energies of californium halides, hydrides, oxides (where known); and reduction potentials where known.
Californium: history
Californium was discovered by Glenn T. Seaborg, Stanley G. Thompson, Albert Ghiorso, Kenneth Street in 1950 at USA. Origin of name: named after the State and University of "California", USA.
Californium: isolation
Isolation: coming soon!