Özellikler

CAS Number53850-35-4
PubChem CIDna
Atom yarıçapı-
Atomik Hacim-
Atom ağırlığı[268]
Blokd
Kaynama noktası-
Bulk Modulus
KategoriGeçiş metalleri
Kristal yapısı
Renk
Kovalent yarıçapı149
Yoğunluk39
Electrical Resistivity
Elektron dizilimi[Rn] 5f14 6d3 7s2
Enerji seviyesi başına Elektronlar2, 8, 18, 32, 32, 11, 2
Elektronegatifliği-
Electrons105
Grup5
Ergime ısısına
Buharlaşma ısısına
İyonlaşma enerjisi-
Magnetic Ordering
Magnetic Susceptibility
Kütle[268]
Mass Number105
Ergime noktası-
İsimDubniyum
Nötronlar157
Atom numarası262
Yükseltgenme seviyeleri5
Periyot7
FazKatı
Poisson Ratio
Protonlar105
Shear Modulus
Isı kapasitesi-
SembolDb
Isıl iletkenlik0,58
Van der Waals radius
Young's Modulus
Bulunabilirlik
Dünya kabuğundaki bulunulabilirliğina
Evrendeki bulunulabilirliğina
Db Dubniyum 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. From the Latin word radius meaning ray 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

Radyum izotopları

Standard Atomic Weight

Kararlı izotoplar

Kararsız izotoplar

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.