Copernicium

Copernicium (Cn)

Atomic Number112
Atomic Weight285
Mass Number277
Group12
Period7
Blockd
Protons112 p+
Neutrons165 n0
Electrons112 e-
Animated Bohr Model Enhanced Bohr Model Bohr Model Orbital Diagram

Properties

Atomic Radius
Atomic Volume
Covalent Radius
122 pm
Metallic Radius
Ionic Radius
Crystal Radius
Van der Waals radius
Density
Boiling Point
Melting Point
Electrons per shell2, 8, 18, 32, 32, 18, 2
Electronegativity
Electrophilicity
Proton Affinity
Electron Affinity
Ionization Potential
Heat of Vaporization
Heat of Fusion
Heat of Formation
Molar Heat Capacity
Specific Heat Capacity
Thermal Conductivity
Gas Basicity
Dipole Polarizability
28 a₀
C6 Dispersion Coefficient
Oxidation States2, 4
Color
Colorless
Crystal Structure ()
Lattice Constant
Bulk Modulus
Electrical Resistivity
Electron Configuration[Rn] 5f14 6d10 7s2
Magnetic Ordering
Magnetic Susceptibility
PhaseLiquid
Poisson Ratio
Shear Modulus
Young's Modulus
Allotropes
Alternate Names
Adiabatic Index
Appearance
Electric Conductivity
Critical Pressure
Critical Temperature
Curie Point
Electrical
Hardness
Magnetic Susceptibility
Magnetic
Neel Point
Neutron Cross Section
Neutron Mass Absorption
Gas Phase
Quantum Numbers
Refractive Index
Space Group
Speed of Sound
Superconducting Point
Thermal Expansion
Valence Electrons
Classification
CategoryTransition metals, Transition metals
CAS GroupIIB
IUPAC GroupIIB
Glawe Number
Mendeleev Number80
Pettifor Number
Geochemical Class
Goldschmidt Classsynthetic
Radioactivity
RadioactiveYes ☢️
Decay Mode
Half-Life
Lifetime
Abundance
Abundance in Earth's crust
Abundance in Oceans
Abundance in Human Body
Abundance in Meteor
Abundance in Sun
Abundance in Universena

Isotopes of Copernicium

Stable Isotopes
Unstable Isotopes
277Cn 278Cn 279Cn 280Cn 281Cn 282Cn 283Cn 284Cn 285Cn

History

Copernicium was first created on February 9, 1996, at the Institute for Heavy Ion Research (Gesellschaft für Schwerionenforschung) in Darmstadt, Germany, by Sigurd Hofmann, Victor Ninov et al. This element was created by firing accelerated zinc-70 nuclei at a target made of lead-208 nuclei in a heavy ion accelerator. A single atom of copernicium was produced with a mass number of 277. Named after the astronomer Nicolaus Copernicus

DiscoverersGSI Helmholtz Centre for Heavy Ion Research
Discovery LocationGermany
Discovery Year1996
Name OriginNamed in honor of the astronomer Nicolaus Copernicus.
Copernicium is harmful due to its radioactivity
Copernicium has no stable or naturally-occurring isotopes

Uses

Copernicium is used for scientific research purposes only. It has no significant commercial applications.

Sources

Made by bombarding lead-208 with zinc-70.