Proprietăți

CAS Number7440-57-5
PubChem CID23985
Rază atomică144
Volum molar10,2
Masă atomică196,967
Blocd
Punct de fierbere2.856
Bulk Modulus
CategorieMetale de tranziție
Structură cristalinăFață Centrată Cubic
CuloareAur
Rază de covalență136
Densitate19,282
Electrical Resistivity
Configurație electronică[Xe] 4f14 5d10 6s1
Electroni pe nivelul de energie2, 8, 18, 32, 18, 1
Electronegativitate2,54
Electrons79
Grupă11
Energie de fuziune12,5
Energie de evaporare330
Potențial de ionizare9,226
Magnetic Ordering
Magnetic Susceptibility
Masa196,967
Mass Number79
Punct de topire1.064,2
NumeAur
Neutroni118
Număr atomic197
Număr de oxidare-1, 1, 2, 3, 5
Perioadă6
FazăSolid
Poisson Ratio
Protoni79
Shear Modulus
Căldură specifică0,129
SimbolAu
Conductivitate termică3,17
Van der Waals radius
Young's Modulus
Abundență naturală
Abundența în scoarța Pământului3.1×10-7%
Abundența în Univers6×10-8%
Au Aur 79 196.966569 11 6 d 79 1064.0 3080.0 [Xe] 4f14 5d10 6s1 2 8 18 32 18 1 19.3 3.1E-7% Gold Cubic: Face centered 2.5 1.92 {"1":"890.1","2":"1980"} 890 222.8 +3,1 1.46 10.2 12.36 324.43 0.128 317.0 0 Solid, Diamagnetic, Conductor, TransitionMetal, Metal, Stable, Natural GOLD Soft, malleable, bright yellow metal. Very malleable. Used in electronics, jewelry and coins. It is a good reflector of infrared radiation, so a thin film of gold is applied to the glass of skyscrapers to reduce internal heating from sunlight. Found in veins in the crust, with cooper ore and native . 3OoLHe-4aNA Gold
Gadolinium was first detected spectroscopically in 1880 by the Swiss chemist Jean Charles Galissard de Marignac who separated its oxide.

He observed spectroscopic lines due to gadolinium in samples of gadolinite and in the separate mineral cerite.

The metal was isolated by Paul Emile Lecoq de Boisbaudran in 1886. De la gadolinite, un mineral numit pentru Gadolin, un chimist finlandez 79 From the Anglo-Saxon word "gold" (the origin of the symbol Au is the Latin word "aurum" meaning "gold")

Isotopes of Gadolinium

Standard Atomic Weight

196.966569(5)

Izotopi stabili

197Au

Izotopi instabili

169Au 170Au 171Au 172Au 173Au 174Au 175Au 176Au 177Au 178Au 179Au 180Au 181Au 182Au 183Au 184Au 185Au 186Au 187Au 188Au 189Au 190Au 191Au 192Au 193Au 194Au 195Au 196Au 198Au 199Au 200Au 201Au 202Au 203Au 204Au 205Au

Gadolinium is considered to be moderately toxic
Gadolinium has the highest neutron cross-section among any stable nuclides
Gadolinium is used to make gadolinium yttrium garnets which have microwave applications.

It is also used in intravenous radiocontrast agents in magnetic resonance imaging (MRI).

Gadolinium compounds are used for making green phosphors for color TV tubes, and in manufacturing compact discs.