Copernicium (Cn)

Copernicium is the 112th element in the periodic table and has a symbol of Cn and atomic number of 112. It has an atomic weight of (285) and a mass number of 276. Copernicium has one hundred twelve protons and one hundred sixty-four neutrons in its nucleus, and one hundred twelve electrons in seven shells. It is located in group twelve, period seven and block d of the periodic table.

Atomic Number	112
Atomic Weight	285
Mass Number	276

Group	12
Period	7
Block	d

Protons	112 p⁺
Neutrons	164 n⁰
Electrons	112 e^-

Properties

Physical Properties
Atomic Radius
Molar Volume
Covalent Radius	122 pm 137 pm 130 pm
Metallic Radius
Ionic Radius
Crystal Radius
Van der Waals Radius
Density	14 g/cm³
Energy
Proton Affinity
Electron Affinity
Ionization Energy
Heat of Vaporization
Heat of Fusion
Heat of Formation
Electrons
Electron Shells	2, 8, 18, 32, 32, 18, 2

Valence Electrons	2
Electron Configuration	[Rn] 5f¹⁴ 6d¹⁰ 7s²

Oxidation States	2
Electronegativity
Electrophilicity
Phases
Phase	Liquid
Gas Phase
Boiling Point
Melting Point
Critical Pressure
Critical Temperature
Triple Point
Visual
Copernicium is a Colorless.
Color	Colorless
Appearance
Refractive Index
Thermodynamic Properties
Thermal Conductivity
Thermal Expansion
Molar Heat Capacity
Specific Heat Capacity
Heat Capacity Ratio (Adiabatic Index)
Electrical Properties
Type
Electrical Conductivity
Electrical Resistivity
Superconducting Point
Magnetism
Type
Magnetic Susceptibility (Mass)
Magnetic Susceptibility (Molar)
Magnetic Susceptibility (Volume)
Magnetic Ordering
Curie Point
Neel Point
Structure
The lattice angles of Copernicium is .
Crystal Structure	()
Lattice Constant
Lattice Angles
Mechanical Properties

Hardness
Bulk Modulus
Shear Modulus
Young Modulus
Poisson Ratio
Speed of Sound
Classification
The CAS Group of Copernicium is IIB. The IUPAC Group of Cn is IIB. The Mendeleev Number of Element 112 is 80. The Goldschmidt Class of Copernicium (Cn) is synthetic.
Category	Transition metals, Transition metals
CAS Group	IIB
IUPAC Group	IIB
Glawe Number
Mendeleev Number	80
Pettifor Number
Geochemical Class
Goldschmidt Class	synthetic
Other
The Dipole Polarizability of Copernicium is 28 plus or minus 2 a₀. The Allotropes of Cn is . The Quantum Numbers of Element 112 is 1S0. The Space Group of Copernicium (Cn) is ().
Gas Basicity
Dipole Polarizability	28 ± 2 a₀
C6 Dispersion Coefficient
Allotropes
Neutron Cross Section
Neutron Mass Absorption
Quantum Numbers	1S0
Space Group	()

Isotopes of Copernicium

Stable Isotopes	0
Unstable Isotopes	13
Radioactive Isotopes	13

²⁷⁶Cn

Abundance	Radioactive ☢️
Relative Atomic Mass	276.161418 ± 0.000537 Da
Mass Number	276
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year
Parity	+

²⁷⁶Cn Decay Modes

Decay Mode	Intensity
α (α emission)	%
SF (spontaneous fission)	%

²⁷⁷Cn

Abundance	Radioactive ☢️
Relative Atomic Mass	277.163535 ± 0.000165 Da
Mass Number	277
G-Factor
Half Life	790 ± 330 us
Spin
Quadrupole Moment
Discovery Year	1996
Parity

²⁷⁷Cn Decay Modes

Decay Mode	Intensity
α (α emission)	100%

²⁷⁸Cn

Abundance	Radioactive ☢️
Relative Atomic Mass	278.164083 ± 0.00047 Da
Mass Number	278
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year
Parity	+

²⁷⁸Cn Decay Modes

Decay Mode	Intensity
α (α emission)	%
SF (spontaneous fission)	%

²⁷⁹Cn

Abundance	Radioactive ☢️
Relative Atomic Mass	279.166422 ± 0.000424 Da
Mass Number	279
G-Factor
Half Life
Spin
Quadrupole Moment
Discovery Year
Parity

²⁷⁹Cn Decay Modes

Decay Mode	Intensity
α (α emission)	%
SF (spontaneous fission)	%

²⁸⁰Cn

Abundance	Radioactive ☢️
Relative Atomic Mass	280.167102 ± 0.000626 Da
Mass Number	280
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year
Parity	+

²⁸⁰Cn Decay Modes

Decay Mode	Intensity
α (α emission)	%
SF (spontaneous fission)	%

²⁸¹Cn

Abundance	Radioactive ☢️
Relative Atomic Mass	281.169563 ± 0.000427 Da
Mass Number	281
G-Factor
Half Life	180 ± 80 ms
Spin
Quadrupole Moment
Discovery Year	2010
Parity

²⁸¹Cn Decay Modes

Decay Mode	Intensity
α (α emission)	100%
SF (spontaneous fission)	%

²⁸²Cn

Abundance	Radioactive ☢️
Relative Atomic Mass	282.170507 ± 0.000588 Da
Mass Number	282
G-Factor	0
Half Life	1.1 ± 0.3 ms
Spin	0
Quadrupole Moment	0
Discovery Year	2004
Parity	+

²⁸²Cn Decay Modes

Decay Mode	Intensity
SF (spontaneous fission)	100%
α (α emission)	%

²⁸³Cn

Abundance	Radioactive ☢️
Relative Atomic Mass	283.173202 ± 0.00066 Da
Mass Number	283
G-Factor
Half Life	4.7 ± 0.8 s
Spin
Quadrupole Moment
Discovery Year	2004
Parity

²⁸³Cn Decay Modes

Decay Mode	Intensity
α (α emission)	81%
SF (spontaneous fission)	19%

²⁸⁴Cn

Abundance	Radioactive ☢️
Relative Atomic Mass	284.17436 ± 0.000819 Da
Mass Number	284
G-Factor	0
Half Life	102 ± 17 ms
Spin	0
Quadrupole Moment	0
Discovery Year	2004
Parity	+

²⁸⁴Cn Decay Modes

Decay Mode	Intensity
SF (spontaneous fission)	100%

²⁸⁵Cn

Abundance	Radioactive ☢️
Relative Atomic Mass	285.177227 ± 0.000544 Da
Mass Number	285
G-Factor
Half Life	30 ± 8 s
Spin
Quadrupole Moment
Discovery Year	2004
Parity

²⁸⁵Cn Decay Modes

Decay Mode	Intensity
α (α emission)	100%

²⁸⁶Cn

Abundance	Radioactive ☢️
Relative Atomic Mass	286.178691 ± 0.000751 Da
Mass Number	286
G-Factor	0
Half Life	30 ± 30 s
Spin	0
Quadrupole Moment	0
Discovery Year	2016
Parity	+

²⁸⁶Cn Decay Modes

Decay Mode	Intensity
α (α emission)	100%
SF (spontaneous fission)	%

²⁸⁷Cn

Abundance	Radioactive ☢️
Relative Atomic Mass	287.181826 ± 0.000751 Da
Mass Number	287
G-Factor
Half Life
Spin
Quadrupole Moment
Discovery Year
Parity

²⁸⁷Cn Decay Modes

Decay Mode	Intensity
α (α emission)	%
SF (spontaneous fission)	%

²⁸⁸Cn

Abundance	Radioactive ☢️
Relative Atomic Mass	288.183501 ± 0.000751 Da
Mass Number	288
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year
Parity	+

²⁸⁸Cn Decay Modes

Decay Mode	Intensity
α (α emission)	%
SF (spontaneous fission)	%

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

Discoverers	GSI Helmholtz Centre for Heavy Ion Research
Discovery Location	Germany
Discovery Year	1996
Etymology (Name Origin)	Named in honor of the astronomer Nicolaus Copernicus.
Pronunciation

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.

Abundance
Abundance in Earth's crust
Abundance in Oceans
Abundance in Human Body	0 %
Abundance in Meteor	0 %
Abundance in Sun	0 %
Abundance in Universe	0 %

Nuclear Screening Constants

Copernicium on ChemicalAid

Australian Educational Vocabulary ID	scot/3590
CAS Registry Number	54084-26-3
ChEBI ID	33517
Den Store Danske ID	copernicium
Encyclopedia of China ID (Second Edition)	249670
Encyclopædia Britannica Online ID	science/copernicium
Freebase ID	/m/025t_2_
French Vikidia ID	Copernicium
GND ID	7550255-0
Gran Enciclopèdia Catalana ID	0251476
Great Russian Encyclopedia Online ID	3287431
KBpedia ID	Copernicium
NE.se ID	ununbium
NE.se ID	copernicium
OmegaWiki Defined Meaning	368710
Store norske leksikon ID	copernicium
USGS Thesaurus ID	1604

Copernicium (Cn)

Properties

Isotopes of Copernicium

276Cn

276Cn Decay Modes

277Cn

277Cn Decay Modes

278Cn

278Cn Decay Modes

279Cn

279Cn Decay Modes

280Cn

280Cn Decay Modes

281Cn

281Cn Decay Modes

282Cn

282Cn Decay Modes

283Cn

283Cn Decay Modes

284Cn

284Cn Decay Modes

285Cn

285Cn Decay Modes

286Cn

286Cn Decay Modes

287Cn

287Cn Decay Modes

288Cn

288Cn Decay Modes