Kadmium

(Àtúnjúwe láti Cadmium)

Kadmium (pípè /ˈkædmiəm/, KAD-mee-əm) je ipilese elegbogi pelu ami-idamo Cd ati nomba atomu 48.

Cadmium, 48Cd
Cadmium
Pípè /ˈkædmiəm/ (KAD-mee-əm)
Ìhànsójúsilvery gray metallic
Ìwúwo átọ̀mù Ar, std(Cd)112.414(4)[1]
Cadmium ní orí tábìlì àyè
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 Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson
Zn

Cd

Hg
silvercadmiumindium
Nọ́mbà átọ̀mù (Z)48
Ẹgbẹ́group 12
Àyèàyè 5
Àdìpọ̀Àdìpọ̀-d
Ẹ̀ka ẹ́límẹ́ntì  Post-transition metal
Ìtò ẹ̀lẹ́ktrọ́nù[Kr] 4d10 5s2
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan2, 8, 18, 18, 2
Àwọn ohun ìní ara
Ìfarahàn at STPsolid
Ìgbà ìyọ́594.22 K ​(321.07 °C, ​609.93 °F)
Ígbà ìhó1040 K ​(767 °C, ​1413 °F)
Kíki (near r.t.)8.65 g/cm3
when liquid (at m.p.)7.996 g/cm3
Heat of fusion6.21 kJ/mol
Heat of 99.87 kJ/mol
Molar heat capacity26.020 J/(mol·K)
 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 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
ElectronegativityPauling scale: 1.69
Atomic radiusempirical: 151 pm
Covalent radius144±9 pm
Van der Waals radius158 pm
Color lines in a spectral range
Color lines in a spectral range
Spectral lines of cadmium
Other properties
Natural occurrenceprimordial
Crystal structurehexagonal
Hexagonal crystal structure for cadmium
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[2]
Young's modulus50 GPa
Shear modulus19 GPa
Bulk modulus42 GPa
Poisson ratio0.30
Mohs hardness2.0
Brinell hardness203 MPa
CAS Number7440-43-9
Main isotopes of cadmium
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct
106Cd 1.25% >9.5×1017 y εε2ν - 106Pd
107Cd syn 6.5 h ε 1.417 107Ag
108Cd 0.89% >6.7×1017 y εε2ν - 108Pd
109Cd syn 462.6 d ε 0.214 109Ag
110Cd 12.49% 110Cd is stable with 62 neutrons
111Cd 12.8% 111Cd is stable with 63 neutrons
112Cd 24.13% 112Cd is stable with 64 neutrons
113Cd 12.22% 7.7×1015 y β 0.316 113In
113mCd syn 14.1 y β 0.580 113In
IT 0.264 113Cd
114Cd 28.73% >9.3×1017 y ββ2ν - 114Sn
115Cd syn 53.46 h β 1.446 115In
116Cd 7.49% 2.9×1019 y ββ2ν - 116Sn
Àdàkọ:Category-inline
| references


  1. Meija, Juris; Coplen, Tyler B.; Berglund, Michael; Brand, Willi A.; De Bièvre, Paul; Gröning, Manfred; Holden, Norman E.; Irrgeher, Johanna et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry 88 (3): 265–91. doi:10.1515/pac-2015-0305. 
  2. Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.