Properties

CAS Number7440-06-4
PubChem CID23939
Atomic Radius139
Atomic Volume9.1
Atomic Weight195.084
Blockd
Boiling Point3,825
Bulk Modulus
CategoryTransition metals
Crystal StructureFace Centered Cubic
ColorGray
Covalent Radius136
Density21.45
Electrical Resistivity
Electron Configuration[Xe] 4f14 5d9 6s1
Electrons per shell2, 8, 18, 32, 17, 1
Electronegativity2.28
Electrons78
Group10
Heat of Fusion20
Heat of Vaporization490
Ionization Potential8.959
Magnetic Ordering
Magnetic Susceptibility
Mass195.084
Mass Number78
Melting Point1,768.3
NamePlatinum
Neutrons117
Atomic Number195
Oxidation States2, 4, 5, 6
Period6
PhaseSolid
Poisson Ratio
Protons78
Shear Modulus
Specific Heat Capacity0.133
SymbolPt
Thermal Conductivity0.716
Van der Waals radius
Young's Modulus
Abundance
Abundance in Earth's crust3.7×10-6%
Abundance in Universe5×10-7%
Pt Platinum 78 195.084 10 6 d 78 1772.0 3827.0 [Xe] 4f14 5d9 6s1 2 8 18 32 17 1 21.4 3.7E-6% Gray Cubic: Face centered 2.3 1.72 {"1":"870","2":"1791"} 870 205.3 +4,2 1.39 9.1 19.66 510.45 0.13 71.6 0 Solid, Paramagnetic, Conductor, TransitionMetal, Metal, Stable, Natural PLAT-n-em Rare, very heavy, soft, silvery-white metal. Used in jewelry, to make crucible and special containers and as a catalyst. Used with cobalt to produce very strong magnets. Also to make standard weights and measures. Resists corrosion and acid attacks except aqua regia. Produced from deposits of native, or elemental, platinum. LZyy4e7K8hQ Platinum
Europium was first found by Paul Émile Lecoq de Boisbaudran in 1890.

In 1896, French chemist Eugène-Antole Demarçay identified spectroscopic lines in ‘samarium' caused by europium.

He successfully isolated europium in 1901 using repeated crystallizations of samarium magnesium nitrate. Europium was named after Europe 78 1735 Antonio de Ulloa South America From the Spanish word "platina" meaning "silver"

Isotopes of Europium

Standard Atomic Weight

195.084(9)

Stable Isotopes

190Pt 192Pt 194Pt 195Pt 196Pt 198Pt

Unstable Isotopes

166Pt 167Pt 168Pt 169Pt 170Pt 171Pt 172Pt 173Pt 174Pt 175Pt 176Pt 177Pt 178Pt 179Pt 180Pt 181Pt 182Pt 183Pt 184Pt 185Pt 186Pt 187Pt 188Pt 189Pt 191Pt 193Pt 197Pt 199Pt 200Pt 201Pt 202Pt

Europium is considered to be mildly toxic
Europium is the most reactive rare earth element
Europium is used in the manufacture of fluorescent glass.

It is also used in the anti-counterfeiting phosphors in Euro banknotes.

Europium-doped plastic has been used as a laser material.

Europium isotopes are good neutron absorbers and are used in nuclear reactor control rods.