Sesium
55
Cs
Kumpulan
1
Kala
6
Blok
s
Proton
Elektron
Neutron
55
55
78
Ciri-Ciri Am
Nombor atom
55
Berat atom
132.9054519
Nombor jisim
133
Kategori
Logam alkali
Warna
Perak
Radioaktif
Ya
From the Latin word caesius, sky blue
Struktur hablur
Pusat Badan Kubik
Sejarah
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.
Bilangan elektron per petala
2, 8, 18, 18, 8, 1
Konfigurasi elektron
[Xe] 6s1
Cesium was the first element discovered using a spectroscope
Ciri-Ciri Fizikal
Fasa
Pepejal
Ketumpatan
1.873 g/cm3
Takat lebur
301.59 K | 28.44 °C | 83.19 °F
Takat didih
944.15 K | 671 °C | 1239.8 °F
Haba pelakuran
2.09 kJ/mol
Haba pengewapan
65 kJ/mol
Muatan haba molar
0.242 J/g·K
Banyak pada kerak bumi
0.00019%
Banyak pada alam semesta
8×10-8%
Nombor CAS
7440-46-2
Nombor PubChem CID
5354618
Ciri-Ciri Atom
Jejari atom
265 pm
Jejari kovalen
244 pm
Keelektronegatifan
0.79 (Skala Pauling)
Kebolehan mengion
3.8939 eV
Isipadu atom
71.07 cm3/mol
Daya pengaliran terma
0.359 W/cm·K
Keadaan pengoksidaan
-1, 1
Aplikasi
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
Isotop
Isotop stabil
133CsIsotop tidak stabil
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