Europium

63
Eu
Groep
n/a
Periode
6
Blok
f
Protrone
Elektrone
Neutrone
63
63
89
Algemene Eienskappe
Atoom Nommer
63
Atoommassa
151,964
Massa Nommer
152
Kategorie
Lantaniede
Kleur
Silver
Radioaktief
Nee
Europium was named after Europe
Kristalstruktuur
Ligaamsgesentreerde kubieke
Geskiendenis
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.
Elektrone per skil
2, 8, 18, 25, 8, 2
Elektronkonfigurasie
[Xe] 4f7 6s2
Eu
Europium is the most reactive rare earth element
Fisiese Eienskappe
Fase
Soliede
Digtheid
5,243 g/cm3
Smeltpunt
1099,15 K | 826 °C | 1518,8 °F
Kookpunt
1802,15 K | 1529 °C | 2784,2 °F
Heat of Fusion
9,2 kJ/mol
Heat of Vaporization
175 kJ/mol
Spesifieke Hitte Kapasiteit
0,182 J/g·K
Oorvloed in die aardkors
0,00018%
Oorvloed in die heelal
5×10-8%
Weakly
Beeld Krediete: Images-of-elements
Weakly oxidized europium, hence slightly yellowish
CAS Nommer
7440-53-1
PubChem CID Nommer
23981
Atomiese Eienskappe
Atoom radius
180 pm
Kovalente Radius
198 pm
Elektronegatiewiteit
1,2 (Pauling scale)
Ionisasie potensiaal
5,6704 eV
Atoom volume
20,8 cm3/mol
Termiese geleidingsvermoë
0,139 W/cm·K
Oksidasiestate
2, 3
Toepassings
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.
Europium is considered to be mildly toxic
Isotope
Stabiele Isotope
151Eu, 153Eu
Onstabiele Isotope
130Eu, 131Eu, 132Eu, 133Eu, 134Eu, 135Eu, 136Eu, 137Eu, 138Eu, 139Eu, 140Eu, 141Eu, 142Eu, 143Eu, 144Eu, 145Eu, 146Eu, 147Eu, 148Eu, 149Eu, 150Eu, 152Eu, 154Eu, 155Eu, 156Eu, 157Eu, 158Eu, 159Eu, 160Eu, 161Eu, 162Eu, 163Eu, 164Eu, 165Eu, 166Eu, 167Eu