Roentgenium-285

Properties and data of the isotope ²⁸⁵Rg.

Content

General data

Name of the isotope:Roentgenium-285; Rg-285Symbol:²⁸⁵Rg or 285111RgMass number A:285 (= number of nucleons)Atomic number Z:111 (= number of protons)Neutrons N:174Mass defect:287.376273936 u (per nucleus)Nuclear binding energy:267689.27491374 MeV (per nucleus)
939.26061373 MeV (average binding energy per nucleon)Half-life:- unknown -Spin and parity:
(nuclear angular momentum)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 174) and isobaric (same nucleon number A = 285) with Roentgenium-285. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.