Cezij

55
Cs
Skupina
1
Perioda
6
Blok
s
Protons
Electrons
Neutrons
55
55
78
General Properties
Vrstno število
55
Atomska teža
132,9054519
Mass Number
133
Kategorija
Alkalijske kovine
Barva
Silver
Radioactive
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.
Electrons per shell
2, 8, 18, 18, 8, 1
Razporeditev elektronov
[Xe] 6s1
Cs
Cesium was the first element discovered using a spectroscope
Physical Properties
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
Abundance in Earth's crust
0,00019%
Abundance in Universe
8×10-8%
Cesium
Zasluge za slike: Wikimedia Commons (Dnn87)
Cesium metal sample from the Dennis s.k collection
CAS Number
7440-46-2
PubChem CID Number
5354618
Atomic Properties
Atomski polmer
265 pm
Kovalentni polmer
244 pm
Elektronegativnost
0,79 (Paulingova lestvica)
Ionization Potential
3,8939 eV
Atomic Volume
71,07 cm3/mol
Toplotna prevodnost
0,359 W/cm·K
Oksidacijska stanja
-1, 1
Applications
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 compounds are considered to be mildly toxic
Isotopes
Stable Isotopes
133Cs
Unstable Isotopes
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