Serium
58
Ce
Groep
n/a
Periode
6
Blok
f
Protrone
Elektrone
Neutrone
58
58
82
Algemene Eienskappe
Atoom Nommer
58
Atoommassa
140,116
Massa Nommer
140
Kategorie
Lantaniede
Kleur
Silver
Radioaktief
Nee
Cerium was named for the asteroid Ceres
Kristalstruktuur
Eenvoudige seshoekige
Geskiendenis
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.
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.
Elektrone per skil
2, 8, 18, 19, 9, 2
Elektronkonfigurasie
[Xe] 4f1 5d1 6s2
Seawater contains 1.5 parts per trillion of cerium
Fisiese Eienskappe
Fase
Soliede
Digtheid
6,77 g/cm3
Smeltpunt
1068,15 K | 795 °C | 1463 °F
Kookpunt
3716,15 K | 3443 °C | 6229,4 °F
Heat of Fusion
5,5 kJ/mol
Heat of Vaporization
350 kJ/mol
Spesifieke Hitte Kapasiteit
0,192 J/g·K
Oorvloed in die aardkors
0,006%
Oorvloed in die heelal
1×10-6%
CAS Nommer
7440-45-1
PubChem CID Nommer
23974
Atomiese Eienskappe
Atoom radius
182 pm
Kovalente Radius
204 pm
Elektronegatiewiteit
1,12 (Pauling scale)
Ionisasie potensiaal
5,5387 eV
Atoom volume
20,67 cm3/mol
Termiese geleidingsvermoë
0,114 W/cm·K
Oksidasiestate
2, 3, 4
Toepassings
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 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
Isotope
Stabiele Isotope
136Ce, 138Ce, 140Ce, 142CeOnstabiele Isotope
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