آرنۍ غورنۍ پرانيستل

سېزيوم

(له Caesium نه مخ گرځېدلی)

سېزيوم (په انگرېزي: Caesium) له کیمیاوي عناصرو څخه یو دی چې په تناوبي جدول کې د Cs سمبول او ۵۵ اتمي شمېرې په وسیله ښودل شوی دی.

Caesium,  55Cs
Some pale gold metal, with a liquid-like texture and lustre, sealed in a glass ampoule
A colour spectrum
Spectral lines of caesium
عمومي خواص
Pronunciation /ˈsziəm/
SEE-zee-əm
Alternative name cesium (US, informal)
Appearance pale gold
Caesium په دوراني جدول کې
Hydrogen (diatomic nonmetal)
Helium (noble gas)
Lithium (alkali metal)
Beryllium (alkaline earth metal)
Boron (metalloid)
Carbon (polyatomic nonmetal)
Nitrogen (diatomic nonmetal)
Oxygen (diatomic nonmetal)
Fluorine (diatomic nonmetal)
Neon (noble gas)
Sodium (alkali metal)
Magnesium (alkaline earth metal)
Aluminium (post-transition metal)
Silicon (metalloid)
Phosphorus (polyatomic nonmetal)
Sulfur (polyatomic nonmetal)
Chlorine (diatomic nonmetal)
Argon (noble gas)
Potassium (alkali metal)
Calcium (alkaline earth metal)
Scandium (transition metal)
Titanium (transition metal)
Vanadium (transition metal)
Chromium (transition metal)
Manganese (transition metal)
Iron (transition metal)
Cobalt (transition metal)
Nickel (transition metal)
Copper (transition metal)
Zinc (transition metal)
Gallium (post-transition metal)
Germanium (metalloid)
Arsenic (metalloid)
Selenium (polyatomic nonmetal)
Bromine (diatomic nonmetal)
Krypton (noble gas)
Rubidium (alkali metal)
Strontium (alkaline earth metal)
Yttrium (transition metal)
Zirconium (transition metal)
Niobium (transition metal)
Molybdenum (transition metal)
Technetium (transition metal)
Ruthenium (transition metal)
Rhodium (transition metal)
Palladium (transition metal)
Silver (transition metal)
Cadmium (transition metal)
Indium (post-transition metal)
Tin (post-transition metal)
Antimony (metalloid)
Tellurium (metalloid)
Iodine (diatomic nonmetal)
Xenon (noble gas)
Caesium (alkali metal)
Barium (alkaline earth metal)
Lanthanum (lanthanide)
Cerium (lanthanide)
Praseodymium (lanthanide)
Neodymium (lanthanide)
Promethium (lanthanide)
Samarium (lanthanide)
Europium (lanthanide)
Gadolinium (lanthanide)
Terbium (lanthanide)
Dysprosium (lanthanide)
Holmium (lanthanide)
Erbium (lanthanide)
Thulium (lanthanide)
Ytterbium (lanthanide)
Lutetium (lanthanide)
Hafnium (transition metal)
Tantalum (transition metal)
Tungsten (transition metal)
Rhenium (transition metal)
Osmium (transition metal)
Iridium (transition metal)
Platinum (transition metal)
Gold (transition metal)
Mercury (transition metal)
Thallium (post-transition metal)
Lead (post-transition metal)
Bismuth (post-transition metal)
Polonium (post-transition metal)
Astatine (metalloid)
Radon (noble gas)
Francium (alkali metal)
Radium (alkaline earth metal)
Actinium (actinide)
Thorium (actinide)
Protactinium (actinide)
Uranium (actinide)
Neptunium (actinide)
Plutonium (actinide)
Americium (actinide)
Curium (actinide)
Berkelium (actinide)
Californium (actinide)
Einsteinium (actinide)
Fermium (actinide)
Mendelevium (actinide)
Nobelium (actinide)
Lawrencium (actinide)
Rutherfordium (transition metal)
Dubnium (transition metal)
Seaborgium (transition metal)
Bohrium (transition metal)
Hassium (transition metal)
Meitnerium (unknown chemical properties)
Darmstadtium (unknown chemical properties)
Roentgenium (unknown chemical properties)
Copernicium (transition metal)
Nihonium (unknown chemical properties)
Flerovium (unknown chemical properties)
Moscovium (unknown chemical properties)
Livermorium (unknown chemical properties)
Tennessine (unknown chemical properties)
Oganesson (unknown chemical properties)
Rb

Cs

Fr
xenoncaesiumbarium
اټومي شمیره (Z) 55
گروپ, پیریود group 1 (alkali metals), period 6
بلاک s-block
Element category   alkali metal
معياري اټومي وزن (Ar) کينډۍ:Val[۱]
Electron configuration [Xe] 6s1
Electrons per shell
2, 8, 18, 18, 8, 1
فزیکي خواص
حالت (at STP) جامد
دويلې کيدو ټکى 301.7 K ​(28.5 °C, ​83.3 °F)
يشنا ټکی 944 K ​(671 °C, ​1240 °F)
Density near r.t. 1.93 g/cm3
when liquid, at m.p. 1.843 g/cm3
Critical point 1938 K, 9.4 MPa[۲]
Heat of fusion 2.09 kJ/mol
Heat of vaporization 63.9 kJ/mol
Molar heat capacity 32.210 J/(mol·K)
Vapour pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 418 469 534 623 750 940
اټومي خواص
Oxidation states +1, −1[۳] ​(a strongly basic oxide)
Electronegativity Pauling scale: 0.79
Ionization energies
  • 1st: 375.7 kJ/mol
  • 2nd: 2234.3 kJ/mol
  • 3rd: 3400 kJ/mol
Atomic radius empirical: 265 pm
Covalent radius 244±11 pm
Van der Waals radius 343 pm
Miscellanea
Crystal structurebody-centred cubic (bcc)
Bodycentredcubic crystal structure for caesium
Thermal expansion 97 µm/(m·K) (at 25 °C)
د تودوخې تېرېدنه 35.9 W/(m·K)
Electrical resistivity 205 nΩ·m (at 20 °C)
Magnetic ordering paramagnetic[۴]
Young's modulus 1.7 GPa
Bulk modulus 1.6 GPa
Mohs hardness 0.2
Brinell hardness 0.14 MPa
CAS Number 7440-46-2
History
Naming from Latin caesius, sky blue, for its spectral colours
Discovery Robert Bunsen and Gustav Kirchhoff (1860)
First isolation Carl Setterberg (1882)
Main isotopes of caesium
آيسو­ټوپ Abun­dance نیم ژوند (t1/2) Decay mode Pro­duct
133Cs 100% stable

کينډۍ:Infobox element/isotopes decay2

135Cs trace 2.3×106 y β 135Ba
137Cs syn 30.17 y[۵] β 137Ba
| references | in Wikidata

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سرچينېسمول

  1. Meija, J.; Coplen, T. B. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure Appl. Chem. 88 (3): 265-91. doi:10.1515/pac-2015-0305. https://www.degruyter.com/downloadpdf/j/pac.2016.88.issue-3/pac-2015-0305/pac-2015-0305.xml. 
  2. کينډۍ:RubberBible92nd
  3. Dye, J. L. (1979). [اصطلاحي تېروتنه: د ناپېژندلې ليکنښې لوښه "۱". "Compounds of Alkali Metal Anions"]. Angewandte Chemie International Edition 18 (8): 587–598. doi:10.1002/anie.197905871. 
  4. "Magnetic susceptibility of the elements and inorganic compounds" (PDF). Handbook of Chemistry and Physics (87th ed.). CRC press. ISBN 0-8493-0487-3. http://www-d0.fnal.gov/hardware/cal/lvps_info/engineering/elementmagn.pdf. Retrieved 2010-09-26. 
  5. . NIST Radionuclide Half-Life Measurements. NIST.

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