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)
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 ωp 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 Ieff = Z*10.0 eV assumed in calculating critical energies and dE/dx.
Table of isotopes via WIKIPEDIA