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Roentgenium
(Rg)
28183232181
Rg
Category
Transition metal
Relative atomic mass
269.1087
Density
13.51
Melting point (°C)
1342
Boiling point (°C)
3100
Electronegativity (Pauling)
1.28
Half-life
2.1 min
Discovery year
1949
Discovered by
Glenn T. Seaborg
Electrons: 111
Protons: 111
Neutrons: 171

Wikipedia

Wikipedia
Decay chain
  1. Rg-282(2.1 min)
    α decay
  2. Mt-278(4.5 s)
    α decay
  3. Bh-274(0.9 min)
    α decay
  4. Db-270(1.0 h)
created by @lukaswyss
Roentgenium (Rg) – Element 111