Европиум

63
Eu
Група
Нема одговор
Периода
6
блок
f
Protons
Electrons
Neutrons
63
63
89
Општи Својства
Атомски број
63
Атомска тежина
151,964
Mass Number
152
Category
Ланта­ноид
Color
Silver
Radioactive
Не
Europium was named after Europe
Кристална структура
Body Centered Cubic
History
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.
Electrons per shell
2, 8, 18, 25, 8, 2
Електронска конфигурација
[Xe] 4f7 6s2
Eu
Europium is the most reactive rare earth element
Физички Својства
Фаза
Solid
Густина
5,243 g/cm3
Точка на топење
1099,15 K | 826 °C | 1518,8 °F
Точка на вриење
1802,15 K | 1529 °C | 2784,2 °F
Топлина на топење
9,2 kJ/mol
Топлина на испарување
175 kJ/mol
Specific Heat Capacity
0,182 J/g·K
Abundance in Earth's crust
0,00018%
Abundance in Universe
5×10-8%
Weakly
Кредити на слика: Images-of-elements
Weakly oxidized europium, hence slightly yellowish
CAS Number
7440-53-1
PubChem CID Number
23981
Атомски Својства
Атомски полупречник
180 pm
Ковалентен полупречник
198 pm
Електронегативност
1,2 (Полингова скала)
Ionization Potential
5,6704 eV
Atomic Volume
20,8 cm3/mol
Thermal Conductivity
0,139 W/cm·K
Oxidation States
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.
Europium is considered to be mildly toxic
Isotopes
Stable Isotopes
151Eu, 153Eu
Unstable 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