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మూస:Infobox cadmium

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కాడ్మియం, 00Cd
కాడ్మియం
Pronunciation/ˈkædmiəm/ ​(KAD-mee-əm)
Appearancesilvery bluish-gray metallic
Standard atomic weight Ar°(Cd)
కాడ్మియం in the periodic table
Groupgroup 12
Periodperiod 5
Block 
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
Other properties
Natural occurrenceprimordial
Crystal structure ​hexagonal 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
| references

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.
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