Kadmium

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Cadmium
48Cd
Zn

Cd

Hg
silvercadmiumindium
Ìhànsójú
silvery gray metallic
Àwọn ìdámọ́ wíwọ́pọ̀
Orúkọ, àmì-ìdámọ́, nọ́mbà cadmium, Cd, 48
Ẹ̀ka ẹ́límẹ̀nti transition metal
Alternatively considered a post-transition metal
Ẹgbẹ́, àsìkò, àdìpò 125, d
Ìwúwo átọ́mù 112.411
Ìtòléra ẹ̀lẹ́ktrónì [Kr] 5s2 4d10
2, 8, 18, 18, 2
Physical properties
Phase solid
Density (near r.t.) 8.65 g·cm−3
Liquid density at m.p. 7.996 g·cm−3
Melting point 594.22 K, 321.07 °C, 609.93 °F
Boiling point 1040 K, 767 °C, 1413 °F
Heat of fusion 6.21 kJ·mol−1
Heat of vaporization 99.87 kJ·mol−1
Molar heat capacity 26.020 J·mol−1·K−1
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 (mildly basic oxide)
Electronegativity 1.69 (Pauling scale)
Ionization energies 1st: 867.8 kJ·mol−1
2nd: 1631.4 kJ·mol−1
3rd: 3616 kJ·mol−1
Atomic radius 151 pm
Covalent radius 144±9 pm
Van der Waals radius 158 pm
Miscellanea
Crystal structure hexagonal
Cadmium has a hexagonal crystal structure
Magnetic ordering diamagnetic[1]
Electrical resistivity (22 °C) 72.7 nΩ·m
Thermal conductivity 96.6 W·m−1·K−1
Thermal expansion (25 °C) 30.8 µm·m−1·K−1
Speed of sound (thin rod) (20 °C) 2310 m·s−1
Young's modulus 50 GPa
Shear modulus 19 GPa
Bulk modulus 42 GPa
Poisson ratio 0.30
Mohs hardness 2.0
Brinell hardness 203 MPa
CAS registry number 7440-43-9
Àwọn ísótòpù dídúró jùlọ
Main article: Àwọn ísótòpù cadmium
iso NA half-life DM DE (MeV) DP
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
· r

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


Itokasi[àtúnṣe | àtúnṣe àmìọ̀rọ̀]

  1. Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.