Europium
63
Eu
Gruppe
i/t
Periode
6
Blokk
f
Proton
Elektron
Nøytron
63
63
89
Generelle eigenskapar
Atomnummer
63
Atommasse
151,964
Massetal
152
Kategori
Lantanid
Farge
Sølv
Radioaktiv
Nei
Europium was named after Europe
Krystallstruktur
Romsentrert kubisk
Historie
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.
Elektron per energinivå
2, 8, 18, 25, 8, 2
Elektronkonfigurasjon
[Xe] 4f7 6s2
Europium is the most reactive rare earth element
Fysiske eigenskapar
Tilstandsform
Fast stoff
Tettleik
5,243 g/cm3
Smeltepunkt
1099,15 K | 826 °C | 1518,8 °F
Kokepunkt
1802,15 K | 1529 °C | 2784,2 °F
Smeltevarme
9,2 kJ/mol
Fordampingsvarme
175 kJ/mol
Spesifikk varmekapasitet
0,182 J/g·K
Førekomst i jordskorpa
0,00018%
Førekomst i universet
5×10-8%
CAS-nummer
7440-53-1
PubChem CID-nummer
23981
Atom eigenskapar
Atomradius
180 pm
Kovalent radius
198 pm
Elektronegativitet
1,2 (Paulings skala)
Ioniseringspotensial
5,6704 eV
Molart volum
20,8 cm3/mol
Termisk konduktivitet
0,139 W/cm·K
Oksidasjonstrinn
2, 3
Bruksområde
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
Isotopar
Stabile isotopar
151Eu, 153EuUstabile isotopar
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