Md-260 vs Rg-274

Md-260 (mendelevium-260) | Rg-274 (roentgenium-274)

| Md-260 | Rg-274 half-life | 31.8 days (30.6 to 33 days) | 5 ms mean lifetime | 45.9 days (44 to 48 days) | 7 ms decay constant | 2.52×10^-7 per second | 140 per second specific activity | 584 TBq/g | 3×10^11 TBq/g width | 1.15×10^-22 eV | 9×10^-14 eV decay modes | ϵ (electron capture) | α (alpha emission) | β^- (electron emission) | SF (spontaneous fission) | α (alpha emission) final decay products | Pb-208 (0.4%) | Pb-206 (1×10^-11%) | Pb-204 (0%) | Hg-200 (0%) | Hg-204 (0%) | Ce-140 (0%) | Dy-156 (0%) | Dy-160 (0%) | Dy-164 (0%) | Er-164 (0%) | Er-168 (0%) | Gd-156 (0%) | Hf-176 (0%) | Hf-180 (0%) | Pb-206 (0%) | Pb-208 (0%) | Sm-144 (0%) | Sm-152 (0%) | Tl-205 (0%) | W-184 (0%) | Yb-168 (0%) | Yb-172 (0%)

decay mode | ϵ (electron capture) branching ratio | 5% Q-value | 907 keV (kiloelectronvolts) daughter nuclide | Fm-260 decay mode | α (alpha emission) branching ratio | 5% Q-value | 6.94 MeV (megaelectronvolts) daughter nuclide | Es-256 decay mode | β^- (electron emission) branching ratio | 3.5% Q-value | 940 keV (kiloelectronvolts) daughter nuclide | No-260 decay mode | SF (spontaneous fission)

decay mode | α (alpha emission) daughter nuclide | Mt-270

Radiation shielding

Decay chain Md-260

Decay chain Rg-274

| Md-260 | Rg-274 atomic number (Z) | 101 | 111 mass number (A) | 260 | 274 neutron number | 159 | 163 atomic mass | 260.103652 u (unified atomic mass units) | 274.155713 u (unified atomic mass units) mass excess | 96.551 MeV (megaelectronvolts) | 145.046 MeV (megaelectronvolts) binding energy per nucleon | 7.396 MeV (megaelectronvolts) | 7.225 MeV (megaelectronvolts)

Mass properties