Europium

63
Eu
Golongan
n/a
Periode
6
Blok
f
Proton
Elektron
Neutron
63
63
89
Sifat Umum
Nomor atom
63
Massa atom
151,964
Nomor massa
152
Kategori
Lantanida
Warna
Perak
Radioaktif
Tidak
Europium was named after Europe
Struktur kristal
Kubik Berpusat-badan
Sejarah
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.
Elektron per kulit
2, 8, 18, 25, 8, 2
Konfigurasi elektron
[Xe] 4f7 6s2
Eu
Europium is the most reactive rare earth element
Sifat Fisika
Fase
Solid
Kepadatan
5,243 g/cm3
Titik lebur
1099,15 K | 826 °C | 1518,8 °F
Titik didih
1802,15 K | 1529 °C | 2784,2 °F
Kalor peleburan
9,2 kJ/mol
Kalor penguapan
175 kJ/mol
Kapasitas kalor molar
0,182 J/g·K
Kelimpahan di kerak bumi
0,00018%
Kelimpahan di alam semesta
5×10-8%
Weakly
Kredit Gambar: Images-of-elements
Weakly oxidized europium, hence slightly yellowish
Nomor CAS
7440-53-1
PubChem CID Number
23981
Sifat Atom
Jari-jari atom
180 pm
Jari-jari kovalen
198 pm
Elektronegativitas
1,2 (Skala Pauling)
Potensi Ionisasi
5,6704 eV
Volume atom
20,8 cm3/mol
Kondusivitas termal
0,139 W/cm·K
Bilangan oksidasi
2, 3
Aplikasi
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
Isotop
Isotop stabil
151Eu, 153Eu
Isotop tidak stabil
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