మూస:కాడ్మియం మూలకం

కాడ్మియం, 00Cd
కాడ్మియం
Pronunciation/ˈkædmiəm/ (KAD-mee-əm)
Appearancesilvery bluish-gray metallic
Standard atomic weight Ar°(Cd)
కాడ్మియం in the periodic table
Hydrogen Helium
Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon
Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon
Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon
Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon
Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Ununtrium Flerovium Ununpentium Livermorium Ununseptium Ununoctium
Zn

Cd

Hg
వెండికాడ్మియంఇండియం
Groupమూస:Infobox element/symbol-to-group/format
Periodperiod 5
Block  d-block
Electron configuration[Kr] 4d10 5s2
Electrons per shell2, 8, 18, 18, 2
Physical properties
Phase at STPsolid
Melting point594.22 K ​(321.07 °C, ​609.93 °F)
Boiling point1040 K ​(767 °C, ​1413 °F)
Density (near r.t.)8.65 g/cm3
when liquid (at m.p.)7.996 g/cm3
Heat of fusion6.21 kJ/mol
Heat of vaporization99.87 kJ/mol
Molar heat capacity26.020 J/(mol·K)
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 530 583 654 745 867 1040
Atomic properties
Oxidation states−2, +1, +2 (a mildly basic oxide)
ElectronegativityPauling scale: 1.69
Atomic radiusempirical: 151 pm
Covalent radius144±9 pm
Van der Waals radius158 pm
Color lines in a spectral range
Spectral lines of కాడ్మియం
Other properties
Natural occurrenceprimordial
Crystal structurehexagonal close-packed (hcp)
Hexagonal close packed crystal structure for కాడ్మియం
Speed of sound thin rod2310 m/s (at 20 °C)
Thermal expansion30.8 µm/(m⋅K) (at 25 °C)
Thermal conductivity96.6 W/(m⋅K)
Electrical resistivity(22 °C) 72.7 n Ω⋅m
Magnetic orderingdiamagnetic[3]
Young's modulus50 GPa
Shear modulus19 GPa
Bulk modulus42 GPa
Poisson ratio0.30
Mohs hardness2.0
Brinell hardness203 MPa
CAS Number7440-43-9
History
DiscoveryKarl Samuel Leberecht Hermann and Friedrich Stromeyer (1817)
First isolationKarl Samuel Leberecht Hermann and Friedrich Stromeyer (1817)
Named byFriedrich Stromeyer (1817)
Isotopes of కాడ్మియం
Template:infobox కాడ్మియం isotopes does not exist
 Category: కాడ్మియం
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References

  1. "Standard Atomic Weights: Cadmium". CIAAW. 2013.
  2. Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; et al. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)". Pure and Applied Chemistry (in ఇంగ్లీష్). doi:10.1515/pac-2019-0603. ISSN 1365-3075.
  3. Lide, D. R., ed. (2000). "Magnetic susceptibility of the elements and inorganic compounds". CRC Handbook of Chemistry and Physics (PDF) (81st ed.). CRC Press. ISBN 978-0-8493-0481-1.