Sifat

CAS Number53850-35-4
PubChem CIDna
Jari-jari atom-
Volume atom-
Massa atom[268]
Blokd
Titik didih-
Bulk Modulus
KategoriLogam transisi
Struktur kristal
Warna
Jari-jari kovalen149
Kepadatan39
Electrical Resistivity
Konfigurasi elektron[Rn] 5f14 6d3 7s2
Elektron per kulit2, 8, 18, 32, 32, 11, 2
Elektronegativitas-
Electrons105
Golongan5
Kalor peleburanna
Kalor penguapanna
Potensi Ionisasi-
Magnetic Ordering
Magnetic Susceptibility
Massa[268]
Mass Number105
Titik lebur-
NamaDubnium
Neutron157
Nomor atom262
Bilangan oksidasi5
Periode7
FaseSolid
Poisson Ratio
Proton105
Shear Modulus
Kapasitas kalor molar-
SimbolDb
Kondusivitas termal0,58
Van der Waals radius
Young's Modulus
Kelimpahan alami
Kelimpahan di kerak bumina
Kelimpahan di alam semestana
Db Dubnium 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

Isotop radium

Standard Atomic Weight

Isotop stabil

Isotop tidak stabil

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.