Cerij

58
Ce
Skupina
n/a
Perioda
6
Blok
f
Protons
Electrons
Neutrons
58
58
82
General Properties
Vrstno število
58
Atomska teža
140,116
Mass Number
140
Kategorija
Lantanoidi
Barva
Silver
Radioactive
Ne
Cerium was named for the asteroid Ceres
Kristalna struktura
Heksagonalna
Zgodovina
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.
Electrons per shell
2, 8, 18, 19, 9, 2
Razporeditev elektronov
[Xe] 4f1 5d1 6s2
Ce
Seawater contains 1.5 parts per trillion of cerium
Physical Properties
Faza snovi
Trdnina
Gostota
6,77 g/cm3
Tališče
1068,15 K | 795 °C | 1463 °F
Vrelišče
3716,15 K | 3443 °C | 6229,4 °F
Talilna toplota
5,5 kJ/mol
Izparilna toplota
350 kJ/mol
Toplotna kapaciteta
0,192 J/g·K
Abundance in Earth's crust
0,006%
Abundance in Universe
1×10-6%
Ultrapure
Zasluge za slike: Images-of-elements
Ultrapure cerium under argon
CAS Number
7440-45-1
PubChem CID Number
23974
Atomic Properties
Atomski polmer
182 pm
Kovalentni polmer
204 pm
Elektronegativnost
1,12 (Paulingova lestvica)
Ionization Potential
5,5387 eV
Atomic Volume
20,67 cm3/mol
Toplotna prevodnost
0,114 W/cm·K
Oksidacijska stanja
2, 3, 4
Applications
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
Isotopes
Stable Isotopes
136Ce, 138Ce, 140Ce, 142Ce
Unstable Isotopes
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