Copernicium is an extremely radioactive synthetic element. The most stable known isotope, copernicium-285, has a half-life of 29 seconds, but has a nuclear isomer with a half-life of 8.9 minutes. It is calculated to have several properties that differ between it and its lighter homologues, zinc, cadmium and mercury. In total, approximately 75 atoms of copernicium have been detected using various nuclear reactions.

1996 by Workers at Gesellschaft für Schwerionenforschung, Germany.

DISCOVERY

From the name of Nicolaus Copernicus, astronomer.

ETYMOLOGY

Copernicium

Element

Cn

Symbol

112

112 Atomic Number

Atomic Number

Transition Metal

Classification

54084-26-3

CAS Number

-

Elemental Colour

-

Refractive Index

-

Poisson Ratio

12.033 cm³

Molar Volume

-

Brinell Hardness

-

Mohs Hardness

-

Vickers Hardness

-

Speed of Sound

-

Bulk Modulus

-

Shear Modulus

-

Young Modulus

Allotropes

NONE

-

Melting Point

-

Boiling Point

-

Automatic Ignition

-

Flashpoint

-

Critical Temperature

-

Critical Pressure

-

Thermal Conductivity

-

Thermal Expansion

-

Specific Heat

-

Heat Fusion

-

Heat Vaporisation

-

Heat Combustion

-

Curie Point

-

Neel Point

-

Adiabatic Index

Solid

Phase

-

Electrical Type

-

Conductivity

-

Resistivity

-

Superconducting Point

-

Magnetic Type

-

Mass Susceptibility

-

Molar Susceptibility

-

Volume Susceptibility

Material Composition

-

Universe

-

Meteorites

-

Sun

-

Earth Crust

-

Oceans

-

Humans

285.177'120'0

Atomic Weight

-

Atomic Radius

122 pm

Covalent Radius Single Bond

137 pm

Covalent Radius Double Bond

130 pm

Covalent Radius Triple Bond

-

Van der Waals Radius

[Rn]7s²5f¹⁴6d¹⁰

Electron Configuration

Cubic, Body-centred

Crystal Structure

23.700'00 g/cm³

Density as Solid

-

Density as Liquid

-

Density as Gas

-

Space Group Name

-

Space Group Number

-

Lattice Angles

-

Lattice Constants

40.00 minutes

Half Life

58.33 minutes

Lifetime

6d¹⁰ = 6, 2, +2, -1/2

Quantum Numbers

-

Neutron Cross Section

-

Neutron Mass Absorption

Stable Isotopes

NONE

Unstable Isotopes

Isotopes Overview

Isotope	Stability	Symbol	Type	Protons		Neutrons		Spin	Parity	Mass		Abundance		Mass Measure	Mass Excess		Binding Energy		Dipole Moment	Quadrupole Moment	Halflife in Years		Halflife in Seconds		A01 Decay Probability		A01 Decay Mode	A01 Decay Energy		A01 Decay Daughter	A01 Decay Link	A02 Decay Probability		A02 Decay Mode	A02 Decay Energy		A02 Decay Daughter	A02 Decay Link	Y01 Decay Product Yield		Y01 Decay Product Nuclide	Y02 Decay Product Yield		Y02 Decay Product Nuclide	Y03 Decay Product Yield		Y03 Decay Product Nuclide	Y04 Decay Product Yield		Y04 Decay Product Nuclide	Y05 Decay Product Yield		Y05 Decay Product Nuclide	Y06 Decay Product Yield		Y06 Decay Product Nuclide	Y07 Decay Product Yield		Y07 Decay Product Nuclide	Y08 Decay Product Yield		Y08 Decay Product Nuclide	Y09 Decay Product Yield		Y09 Decay Product Nuclide	Y10 Decay Product Yield		Y10 Decay Product Nuclide	Y11 Decay Product Yield		Y11 Decay Product Nuclide	Y12 Decay Product Yield		Y12 Decay Product Nuclide
Isotope_112_cn_277_u	Unstable	²⁷⁷Cn	Fermion	112	p	165	n	3/2	1	277.163'943'000'0	u	~ 0	%	~ 0	156.878'000'000'0	MeV	7.210'000'000'0	MeV	-	-	3.49E-11	year	1.100	milli-seconds ( x⁻³ )	100.000'000	%	α	?	keV	²⁷³Ds	²⁷⁷Cn > [ 100 % , α , ? keV ] > ²⁷³Ds								30.016'825	%	²⁰⁵Tl	0.000'000	%	²⁰⁷Pb
Isotope_112_cn_278_u	Unstable	²⁷⁸Cn	Boson	112	p	166	n	0	1	278.164'312'000'0	u	~ 0	%	~ 0	152.712'000'000'0	MeV	7.204'000'000'0	MeV	-	-	3.17E-10	year	10.000	milli-seconds ( x⁻³ )	?	%	α	?	keV	²⁷⁴Ds	²⁷⁸Cn > [ ? % , α , ? keV ] > ²⁷⁴Ds			SF	?	keV	V	²⁷⁸Cn > [ , SF , ? keV ] > V	?	%	¹⁷²Yb	?	%	²⁰⁵Tl	?	%	²⁰⁸Pb
Isotope_112_cn_279_u	Unstable	²⁷⁹Cn	Fermion	112	p	167	n	?	0	279.166'546'000'0	u	~ 0	%	~ 0	153.056'000'000'0	MeV	7.206'000'000'0	MeV	-	-	3.17E-9	year	100.000	milli-seconds ( x⁻³ )	?	%	α	?	keV	²⁷⁵Ds	²⁷⁹Cn > [ ? % , α , ? keV ] > ²⁷⁵Ds			SF	?	keV	V	²⁷⁹Cn > [ , SF , ? keV ] > V	?	%	²⁰⁵Tl	?	%	²⁰⁸Pb	?	%	²⁰⁷Pb	?	%	²⁰⁶Pb	?	%	¹⁷⁶Hf	?	%	¹⁶⁰Dy	?	%	¹⁴⁰Ce	?	%	¹⁵²Sm	?	%	¹⁸⁰Hf	?	%	¹⁵⁶Gd	?	%	¹⁶⁸Er	?	%	¹⁶⁴Dy
Isotope_112_cn_280_u	Unstable	²⁸⁰Cn	Boson	112	p	168	n	?	0	280.167'039'000'0	u	~ 0	%	~ 0	155.136'000'000'0	MeV	7.201'000'000'0	MeV	-	-	3.17E-8	year	1,000.000	milliseconds ( x⁻³ )	?	%	α	?	keV	²⁷⁶Ds	²⁸⁰Cn > [ ? % , α , ? keV ] > ²⁷⁶Ds			SF	?	keV	V	²⁸⁰Cn > [ , SF , ? keV ] > V										?	%	²⁰⁶Pb
Isotope_112_cn_281_u	Unstable	²⁸¹Cn	Fermion	112	p	169	n	3/2	1	281.169'286'000'0	u	~ 0	%	~ 0	155.596'000'000'0	MeV	7.203'000'000'0	MeV	-	-	3.17E-7	year	10.000	seconds ( x⁰ )	?	%	α	?	keV	²⁷⁷Ds	²⁸¹Cn > [ ? % , α , ? keV ] > ²⁷⁷Ds								?	%	²⁰⁵Tl	?	%	²⁰⁷Pb
Isotope_112_cn_282_u	Unstable	²⁸²Cn	Boson	112	p	170	n	0	1	282.169'765'000'0	u	~ 0	%	~ 0	157.689'000'000'0	MeV	7.198'000'000'0	MeV	-	-	9.51E-7	year	30.000	seconds ( x⁰ )	?	%	α	?	keV	²⁷⁸Ds	²⁸²Cn > [ ? % , α , ? keV ] > ²⁷⁸Ds	?	%	SF	?	keV	V	²⁸²Cn > [ ? % , SF , ? keV ] > V	?	%	¹⁷²Yb	?	%	²⁰⁵Tl	?	%	²⁰⁸Pb
Isotope_112_cn_283_u	Unstable	²⁸³Cn	Fermion	112	p	171	n	?	0	283.171'792'000'0	u	~ 0	%	~ 0	158.135'000'000'0	MeV	7.200'7.200'7.200'7.200	MeV	-	-	7.92E-6	year	250.020	seconds ( x⁰ )	90.000'000	%	a	?	keV	²⁷⁹Ds	²⁸³Cn > [ 90 % , a , ? keV ] > ²⁷⁹Ds	10.000'000	%	SF	?	keV	V	²⁸³Cn > [ 10 % , SF , ? keV ] > V										?	%	²⁰⁶Pb	?	%	¹⁷⁶Hf	?	%	¹⁶⁰Dy	?	%	¹⁴⁰Ce	?	%	¹⁵²Sm	?	%	¹⁸⁰Hf	?	%	¹⁵⁶Gd	?	%	¹⁶⁸Er	?	%	¹⁶⁴Dy
Isotope_112_cn_284_u	Unstable	²⁸⁴Cn	Boson	112	p	172	n	0	1	284.172'384'000'0	u	~ 0	%	~ 0	160.023'000'000'0	MeV	7.196'000'000'0	MeV	-	-	9.83E-7	year	31.020	seconds ( x⁰ )	100.000'000	%	α	?	keV	²⁸⁰Ds	²⁸⁴Cn > [ 100 % , α , ? keV ] > ²⁸⁰Ds
Isotope_112_cn_285_u	Unstable	²⁸⁵Cn	Fermion	112	p	173	n	5/2	1	285.174'105'000'0	u	~ 0	%	~ 0	160.574'000'000'0	MeV	7.197'000'000'0	MeV	-	-	1.27E-6	year	40.020	seconds ( x⁰ )	100.000'000	%	α	?	keV	²⁸¹Ds	²⁸⁵Cn > [ 100 % , α , ? keV ] > ²⁸¹Ds

112 – Copernicium, Cn

112 – Copernicium, Cn

112 – Copernicium, Cn

112 – Copernicium, Cn

112 – Copernicium, Cn

Spectrograph

Elemental Tile

Copernicium

Spectrograph

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Spectrograph

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Spectrograph

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Copernicium

Spectrograph

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Copernicium