Evropij
63
Eu
Skupina
n/a
Perioda
6
Blok
f
Protons
Electrons
Neutrons
63
63
89
General Properties
Vrstno število
63
Atomska teža
151,964
Mass Number
152
Kategorija
Lantanoidi
Barva
Silver
Radioactive
Ne
Europium was named after Europe
Kristalna struktura
Telesno centrirana kubična
Zgodovina
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.
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.
Electrons per shell
2, 8, 18, 25, 8, 2
Razporeditev elektronov
[Xe] 4f7 6s2
Europium is the most reactive rare earth element
Physical Properties
Faza snovi
Trdnina
Gostota
5,243 g/cm3
Tališče
1099,15 K | 826 °C | 1518,8 °F
Vrelišče
1802,15 K | 1529 °C | 2784,2 °F
Talilna toplota
9,2 kJ/mol
Izparilna toplota
175 kJ/mol
Toplotna kapaciteta
0,182 J/g·K
Abundance in Earth's crust
0,00018%
Abundance in Universe
5×10-8%
CAS Number
7440-53-1
PubChem CID Number
23981
Atomic Properties
Atomski polmer
180 pm
Kovalentni polmer
198 pm
Elektronegativnost
1,2 (Paulingova lestvica)
Ionization Potential
5,6704 eV
Atomic Volume
20,8 cm3/mol
Toplotna prevodnost
0,139 W/cm·K
Oksidacijska stanja
2, 3
Applications
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.
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
Isotopes
Stable Isotopes
151Eu, 153EuUnstable Isotopes
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