Cezij
55
Cs
Skupina
1
Perioda
6
Blok
s
Protoni
Elektroni
Nevtroni
55
55
78
Splošne lastnosti
Vrstno število
55
Atomska teža
132,9054519
Masno število
133
Kategorija
Alkalijske kovine
Barva
Srebrna
Radioaktivno
Da
From the Latin word caesius, sky blue
Kristalna struktura
Telesno centrirana kubična
Zgodovina
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.
Elektroni po lupinah
2, 8, 18, 18, 8, 1
Razporeditev elektronov
[Xe] 6s1
Cesium was the first element discovered using a spectroscope
Fizikalne lastnosti
Faza snovi
Trdnina
Gostota
1,873 g/cm3
Tališče
301,59 K | 28,44 °C | 83,19 °F
Vrelišče
944,15 K | 671 °C | 1239,8 °F
Talilna toplota
2,09 kJ/mol
Izparilna toplota
65 kJ/mol
Toplotna kapaciteta
0,242 J/g·K
Zastopanost v Zemljini skorji
0,00019%
Zastopanost v vesolju
8×10-8%
CAS številka
7440-46-2
PubChem CID številka
5354618
Atomske lastnosti
Atomski polmer
265 pm
Kovalentni polmer
244 pm
Elektronegativnost
0,79 (Paulingova lestvica)
Ionizacijski potencial
3,8939 eV
Atomski volumen
71,07 cm3/mol
Toplotna prevodnost
0,359 W/cm·K
Oksidacijska stanja
-1, 1
Uporabe
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
Izotopi
Stabilni izotopi
133CsNestabilni izotopi
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