Europium

63
Eu
Kumpulan
Tiada
Kala
6
Blok
f
Proton
Elektron
Neutron
63
63
89
Ciri-Ciri Am
Nombor atom
63
Berat atom
151.964
Nombor jisim
152
Kategori
Lantanid
Warna
Perak
Radioaktif
Tidak
Europium was named after Europe
Struktur hablur
Pusat Badan Kubik
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.
Bilangan elektron per petala
2, 8, 18, 25, 8, 2
Konfigurasi elektron
[Xe] 4f7 6s2
Eu
Europium is the most reactive rare earth element
Ciri-Ciri Fizikal
Fasa
Pepejal
Ketumpatan
5.243 g/cm3
Takat lebur
1099.15 K | 826 °C | 1518.8 °F
Takat didih
1802.15 K | 1529 °C | 2784.2 °F
Haba pelakuran
9.2 kJ/mol
Haba pengewapan
175 kJ/mol
Muatan haba molar
0.182 J/g·K
Banyak pada kerak bumi
0.00018%
Banyak pada alam semesta
5×10-8%
Weakly
Kredit imej: Images-of-elements
Weakly oxidized europium, hence slightly yellowish
Nombor CAS
7440-53-1
PubChem CID Number
23981
Ciri-Ciri Atom
Jejari atom
180 pm
Jejari kovalen
198 pm
Keelektronegatifan
1.2 (Skala Pauling)
Kebolehan mengion
5.6704 eV
Isipadu atom
20.8 cm3/mol
Daya pengaliran terma
0.139 W/cm·K
Keadaan pengoksidaan
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