Atomic and nuclear properties of copernicium (Cn)

Element 112 Recognized by IUPAC May 2009, name recognized February 2010
Status of heaviest elements as of June 2017 (pdf)

Quantity	Value	Units
Atomic number	112
Atomic mass	[285.17712(5)]	g mol-1
Density	??	g cm-3
Mean excitation energy	1156.0	eV
Minimum ionization	1.080	MeV g-1cm2
Nuclear interaction length	222.0	g cm-2
Nuclear collision length	124.9	g cm-2
Pion interaction length	247.5	g cm-2
Pion collision length	147.4	g cm-2
Radiation length	5.16	g cm-2
Critical energy	5.84	MeV (for e-)
Muon critical energy	113.	GeV
Molière radius	18.75	g cm-2
Plasma energy ℏωp	67.57	eV

For muons, dE/dx = a(E) + b(E) E. Tables of b(E): PDF TEXT
Table of muon dE/dx and Range: PDF TEXT
Explanation of some entries
Note: Since there are no stable isotopes, [atomic mass] is that of the longest-lived isotope known as of Jun 2017.
Note: Density 14.0 g/cm³ and I_eff = Z*10.0 eV assumed in calculating critical energies and dE/dx.
Table of isotopes via WIKIPEDIA