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silvery (predicted)[1]
General properties
Name, simbolo, kaiphan roentgenium, Rg, 111
Pronunciation Plantilya:IPAc-en
or Plantilya:IPAc-en
Element category unknown
but probably a transition metal
Group, period, block 117, d
Standard atomic weight [281]
Electron configuration [Rn] 5f14 6d9 7s2
2, 8, 18, 32, 32, 17, 2
Electron shells of roentgenium (2, 8, 18, 32, 32, 17, 2(predicted))
Discovery Gesellschaft für Schwerionenforschung (1994)
Physical properties
Phase magahi (predicted)[3]
Density (near r.t.) 28.7 (predicted)[2] g·cm−3
Atomic properties
Oxidation states 5, 3, 1, −1 (predicted)[2]
Ionization energies
1st: 1022.7 (estimated)[2] kJ·mol−1
2nd: 2074.4 (estimated)[2] kJ·mol−1
3rd: 3077.9 (estimated)[2] kJ·mol−1
Atomic radius 114 (predicted)[2] pm
Covalent radius 121 (estimated)[4] pm
CAS registry number 54386-24-2
Most stable isotopes
Main article: Isotopes of roentgenium
iso NA half-life DM DE (MeV) DP
282Rg syn 0.5 s α 9.00 278Mt
281Rg syn 26 s SF
280Rg syn 3.6 s α 9.75 276Mt
279Rg syn 0.17 s α 10.37 275Mt
only isotopes with half-lives over 0.1 seconds are included here
· r

Ang roentgenyo (Iningles roentgenium) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga Rg ug kaiphan nga atomik 111. Ang roentgenyo mao ang kapos sa datos.

Ang mga gi basihan niini[usba | edit source]

  1. 1.0 1.1 Turler, A. (2004). "Gas Phase Chemistry of Superheavy Elements". Journal of Nuclear and Radiochemical Sciences 5 (2): R19–R25, 
  2. 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Haire, Richard G. (2006). "Transactinides and the future elements". in Morss; Edelstein, Norman M.; Fuger, Jean. The Chemistry of the Actinide and Transactinide Elements (3rd ed.). Dordrecht, The Netherlands: Springer Science+Business Media. ISBN 1-4020-3555-1. 
  3. Östlin, A.; Vitos, L. (2011). "First-principles calculation of the structural stability of 6d transition metals". Physical Review B 84 (11). doi:10.1103/PhysRevB.84.113104. Bibcode2011PhRvB..84k3104O. 
  4. Chemical Data. Roentgenium - Rg, Royal Chemical Society

Galeriya sa hulagway[usba | edit source]