Properties

CAS Number54084-26-3
PubChem CIDna
Atomic Radius-
Atomic Volume-
Atomic Weight[285]
Blockd
Boiling Point-
Bulk Modulus
CategoryTransition metals
Crystal Structure
Color
Covalent Radius122
Density-
Electrical Resistivity
Electron Configuration[Rn] 5f14 6d10 7s2
Electrons per shell2, 8, 18, 32, 32, 18, 2
Electronegativity-
Electrons112
Group12
Heat of Fusionna
Heat of Vaporizationna
Ionization Potential-
Magnetic Ordering
Magnetic Susceptibility
Mass[285]
Mass Number112
Melting Point-
NameKoperniciûm
Neutrons173
Atomic Number285
Oxidation States2, 4
Period7
PhaseLiquid
Poisson Ratio
Protons112
Shear Modulus
Specific Heat Capacity-
SymbolCn
Thermal Conductivity-
Van der Waals radius
Young's Modulus
Abundance
Abundance in Earth's crustna
Abundance in Universena
Cn Koperniciûm 112 (285) 12 7 d 112 [Rn] 5f14 6d10 7s2 2 8 18 32 32 18 2 None 1 40 m 58.3m AlphaEmission TransitionMetal, Metal, Radioactive, Synthetic QHcbQfcwegY Copernicium
Plutonium was first produced in 1940 by Glenn T. Seaborg, Edwin M. McMillan, Joseph W. Kennedy and Arthur Wahl.

Plutonium-238 was produced by deuteron bombardment of uranium-238 in the 60-inch cyclotron at the University of California, Berkeley.

The Berkeley team made neptunium-238 which decayed to plutonium-238. Named after the planet Pluto 112 1996 S. Hofmann, V. Ninov, F. P. Hessberger, P. Armbruster, H. Folger, G. Münzenberg, and others Gesellschaft für Schwerionenforschung (GSI) in Darmstadt, Germany. Temporary systematic IUPAC nomenclature

Isotopes of Plutonium

Standard Atomic Weight

Stable Isotopes

Unstable Isotopes

277Cn 278Cn 279Cn 280Cn 281Cn 282Cn 283Cn 284Cn 285Cn

Plutonium is harmful due to its radioactivity
The atomic bomb dropped on Nagasaki, Japan in 1945 had a plutonium core
The isotope plutonium-239 is a key fissile component in nuclear weapons, due to its ease of fission and availability.

Plutonium-238 has also been used successfully to power artificial heart pacemakers, to reduce the risk of repeated surgery.

Plutonium-238 mixed with beryllium is used to generate neutrons for research purposes.