Serium

58
Ce
Kumpulan
Tiada
Kala
6
Blok
f
Proton
Elektron
Neutron
58
58
82
Ciri-Ciri Am
Nombor atom
58
Berat atom
140.116
Nombor jisim
140
Kategori
Lantanid
Warna
Perak
Radioaktif
Tidak
Cerium was named for the asteroid Ceres
Struktur hablur
Hexagonal Ringkas
Sejarah
Jöns Jakob Berzelius and Wilhelm Hisinger discovered the element in ceria in 1803 in Sweden.

Klaproth discovered it simultaneously and independently in some tantalum samples in Germany.

Carl Gustaf Mosander, who worked closely with Berzelius, prepared metallic cerium in 1825.
Bilangan elektron per petala
2, 8, 18, 19, 9, 2
Konfigurasi elektron
[Xe] 4f1 5d1 6s2
Ce
Seawater contains 1.5 parts per trillion of cerium
Ciri-Ciri Fizikal
Fasa
Pepejal
Ketumpatan
6.77 g/cm3
Takat lebur
1068.15 K | 795 °C | 1463 °F
Takat didih
3716.15 K | 3443 °C | 6229.4 °F
Haba pelakuran
5.5 kJ/mol
Haba pengewapan
350 kJ/mol
Muatan haba molar
0.192 J/g·K
Banyak pada kerak bumi
0.006%
Banyak pada alam semesta
1×10-6%
Ultrapure
Kredit imej: Images-of-elements
Ultrapure cerium under argon
Nombor CAS
7440-45-1
PubChem CID Number
23974
Ciri-Ciri Atom
Jejari atom
182 pm
Jejari kovalen
204 pm
Keelektronegatifan
1.12 (Skala Pauling)
Kebolehan mengion
5.5387 eV
Isipadu atom
20.67 cm3/mol
Daya pengaliran terma
0.114 W/cm·K
Keadaan pengoksidaan
2, 3, 4
Aplikasi
Cerium is used in carbon-arc lighting, especially in the motion picture industry.

Cerium oxide is an important component of glass polishing powders and phosphors used in screens and fluorescent lamps.

Cerium compounds are also used in the manufacture of glass, both as a component and as a decolorizer.
Cerium is considered to be moderately toxic
Isotop
Isotop stabil
136Ce, 138Ce, 140Ce, 142Ce
Isotop tidak stabil
119Ce, 120Ce, 121Ce, 122Ce, 123Ce, 124Ce, 125Ce, 126Ce, 127Ce, 128Ce, 129Ce, 130Ce, 131Ce, 132Ce, 133Ce, 134Ce, 135Ce, 137Ce, 139Ce, 141Ce, 143Ce, 144Ce, 145Ce, 146Ce, 147Ce, 148Ce, 149Ce, 150Ce, 151Ce, 152Ce, 153Ce, 154Ce, 155Ce, 156Ce, 157Ce