Atomic and nuclear properties of materials:
Copernicium
Status of ultraheavies as of April 2010 (pdf)

Quantity	Value	Units
Atomic number	112
Atomic mass	[287.(5)]	g mole-1
Density	??	g cm-3
Mean excitation energy	1156.0	eV
Minimum ionization	1.080	MeV g-1cm2
Nuclear collision length	125.1	g cm-2
Nuclear interaction length	222.5	g cm-2
Pion collision length	147.6	g cm-2
Pion interaction length	248.3	g cm-2
Radiation length	5.19	g cm-2
Critical energy	5.88	MeV (for e-)
Molière radius	18.73	g cm-2
Plasma energy	67.57	eV
Muon critical energy	110.	GeV

For muons, dE/dx = a(E) + b(E) E. Tables of b(E): PS PDF TEXT
Table of muon dE/dx and Range: PS PDF TEXT
Explanation of some entries
Note: Since there are no stable isotopes, [atomic mass] is that of the longest-lived known isotope as of Jan 2007.
Note: Density 14.0 g/cm³ and I_eff = Z*10.0 eV assumed in calculating critical energies and dE/dx.
Table of isotopes Warning: may not be current