Sezyum
55
Cs
Grup
1
Periyot
6
Blok
s
Protonlar
Elektronlar
Nötronlar
55
55
78
Temel Özellikleri
Atom numarası
55
Atom ağırlığı
132,9054519
Kütle Numarası
133
Kategori
Alkali metal
Renk
Gümüşi
Radyoaktif
Evet
From the Latin word caesius, sky blue
Kristal yapısı
Hacim merkezli kübik
Tarihi
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.
Enerji seviyesi başına Elektronlar
2, 8, 18, 18, 8, 1
Elektron dizilimi
[Xe] 6s1
Cesium was the first element discovered using a spectroscope
Fiziksel Özellikleri
Faz
Katı
Yoğunluk
1,873 g/cm3
Ergime noktası
301,59 K | 28,44 °C | 83,19 °F
Kaynama noktası
944,15 K | 671 °C | 1239,8 °F
Ergime ısısı
2,09 kJ/mol
Buharlaşma ısısı
65 kJ/mol
Isı kapasitesi
0,242 J/g·K
Dünya kabuğundaki bulunulabilirliği
0,00019%
Evrendeki bulunulabilirliği
8×10-8%
CAS Numarası
7440-46-2
PubChem CID Numarası
5354618
Atom Özellikleri
Atom yarıçapı
265 pm
Kovalent yarıçapı
244 pm
Elektronegatifliği
0,79 (Pauling ölçeği)
İyonlaşma enerjisi
3,8939 eV
Atomik Hacim
71,07 cm3/mol
Isıl iletkenlik
0,359 W/cm·K
Yükseltgenme seviyeleri
-1, 1
Uygulamalar
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
İzotoplar
Kararlı izotoplar
133CsKararsız izotoplar
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