Sesium
55
Cs
Groep
1
Periode
6
Blok
s
Protrone
Elektrone
Neutrone
55
55
78
Algemene Eienskappe
Atoom Nommer
55
Atoommassa
132,9054519
Massa Nommer
133
Kategorie
Alkalimetale
Kleur
Silver
Radioaktief
Ja
From the Latin word caesius, sky blue
Kristalstruktuur
Ligaamsgesentreerde kubieke
Geskiendenis
Robert Bunsen and Gustav Kirchhoff were the first to suggest finding cesium in 1860 by spectrum analysis.
They discovered cesium by its two blue emission lines in a sample of Dürkheim mineral water.
The pure metal was eventually isolated by the German chemist Carl Setterberg while working on his doctorate with Kekulé and Bunsen.
They discovered cesium by its two blue emission lines in a sample of Dürkheim mineral water.
The pure metal was eventually isolated by the German chemist Carl Setterberg while working on his doctorate with Kekulé and Bunsen.
Elektrone per skil
2, 8, 18, 18, 8, 1
Elektronkonfigurasie
[Xe] 6s1
Cesium was the first element discovered using a spectroscope
Fisiese Eienskappe
Fase
Soliede
Digtheid
1,873 g/cm3
Smeltpunt
301,59 K | 28,44 °C | 83,19 °F
Kookpunt
944,15 K | 671 °C | 1239,8 °F
Heat of Fusion
2,09 kJ/mol
Heat of Vaporization
65 kJ/mol
Spesifieke Hitte Kapasiteit
0,242 J/g·K
Oorvloed in die aardkors
0,00019%
Oorvloed in die heelal
8×10-8%
CAS Nommer
7440-46-2
PubChem CID Nommer
5354618
Atomiese Eienskappe
Atoom radius
265 pm
Kovalente Radius
244 pm
Elektronegatiewiteit
0,79 (Pauling scale)
Ionisasie potensiaal
3,8939 eV
Atoom volume
71,07 cm3/mol
Termiese geleidingsvermoë
0,359 W/cm·K
Oksidasiestate
-1, 1
Toepassings
The radioactive isotope cesium-137 has a half-life of about 30 years and is used in medical applications, industrial gauges, and hydrology.
Cesium is also used in photoelectric cells and as a catalyst in the hydrogenation of organic compounds.
Cesium vapor thermionic generators are low-power devices that convert heat energy to electrical energy.
Cesium is also used in photoelectric cells and as a catalyst in the hydrogenation of organic compounds.
Cesium vapor thermionic generators are low-power devices that convert heat energy to electrical energy.
Cesium compounds are considered to be mildly toxic
Isotope
Stabiele Isotope
133CsOnstabiele Isotope
112Cs, 113Cs, 114Cs, 115Cs, 116Cs, 117Cs, 118Cs, 119Cs, 120Cs, 121Cs, 122Cs, 123Cs, 124Cs, 125Cs, 126Cs, 127Cs, 128Cs, 129Cs, 130Cs, 131Cs, 132Cs, 134Cs, 135Cs, 136Cs, 137Cs, 138Cs, 139Cs, 140Cs, 141Cs, 142Cs, 143Cs, 144Cs, 145Cs, 146Cs, 147Cs, 148Cs, 149Cs, 150Cs, 151Cs