Proprietà

CAS Number53850-35-4
PubChem CIDna
Raggio Atomico-
Volume Molare-
Massa Atomica[268]
Bloccod
Punto di Ebollizione-
Bulk Modulus
CategoriaMetalli di Transizione
Struttura Cristallina
Colore
Raggio Covalente149
Densità39
Electrical Resistivity
Configurazione Elettronica[Rn] 5f14 6d3 7s2
Elettroni per shell2, 8, 18, 32, 32, 11, 2
Elettronegatività-
Electrons105
Gruppo5
Calore di Fusionena
Calore di Evaporazionena
Potenziale di Ionizzazione-
Magnetic Ordering
Magnetic Susceptibility
Massa[268]
Mass Number105
Punto di Fusione-
NomeDubnio
Neutroni157
Numero Atomico262
Stato di Ossidazione5
Periodo7
FaseSolido
Poisson Ratio
Protoni105
Shear Modulus
Capacità Termica Specifica-
SimboloDb
Conduttività Termica0,58
Van der Waals radius
Young's Modulus
Abbondanza
Abbondanza sulla crosta terrestrena
Abbondanza nell'universona
Db Dubnio 105 (268) 5 7 d 105 [Rn] 5f14 6d3 7s2 2 8 18 32 32 11 2 None Unknown 1 5.56 h 8.33h AlphaEmission TransitionMetal, Metal, Radioactive, Synthetic HA-ni-em Synthetic radioactive metal. It has no significant commercial applications. Made by bombarding californium-249 with a beam of nitrogen-15 eeczRrDoL_M Dubnium
Radium was discovered by Marie Curie and Pierre Curie in 1898.

They extracted the radium compound from a uraninite sample.

Radium was isolated in its metallic state by Marie Curie and André-Louis Debierne in 1910 through the electrolysis of radium chloride by using a mercury cathode and distilling in an atmosphere of hydrogen gas. Il nome deriva dal latino radius, raggio 105 1967 Workers at the Nuclear Institute at Dubna, and the University of California, Berkeley, USA. USSR, United States The origin of the name dubnium is the Joint Nuclear Institute at "Dubna", an institute heavily involved in the search for heavy elements

Isotopi del radio

Standard Atomic Weight

Isotopi Stabili

Isotopi Instabili

255Db 256Db 257Db 258Db 259Db 260Db 261Db 262Db 263Db 264Db 265Db 266Db 267Db 268Db 269Db 270Db

Radium is highly radioactive and carcinogenic
Radium imparts a carmine red color to a flame
Radium was formerly used in self-luminous paints for watches, nuclear panels, aircraft switches, clocks, and instrument dials.

Radium chloride was used in medicine to produce radon gas which in turn was used as a cancer treatment.

The isotope 223Ra is currently under investigation for use in medicine as a cancer treatment of bone metastasis.