کادميوم

Cadmium,₄₈Cd

عمومي خواص
Pronunciation	/ˈkædmiəm/ KAD-mee-əm
Appearance	silvery bluish-gray metallic
Cadmium پهدوراني جدولکې
Zn ↑ Cd ↓ Hg silver←cadmium→indium ‍
اټومي شمیره(Z)	48
گروپ,پیریود	group 12,period 5
بلاک	d-block
Element category	transition metal,alternatively considered apost-transition metal
معياري اټومي وزن(Ar)	کينډۍ:Val
Electron configuration	[Kr] 4d105s2
Electrons per shell	2, 8, 18, 18, 2
فزیکي خواص
حالت(atSTP)	جامد
دويلې کيدو ټکى	594.22K​(321.07 °C, ​609.93 °F)
يشنا ټکی	1040 K ​(767 °C, ​1413 °F)
Densitynearr.t.	8.65 g/cm3
when liquid, atm.p.	7.996 g/cm3
Heat of fusion	6.21kJ/mol
Heat of vaporization	99.87 kJ/mol
Molar heat capacity	26.020 J/(mol·K)
Vapor pressure P(Pa) 1 10 100 1 k 10 k 100 k atT(K) 530 583 654 745 867 1040
اټومي خواص
Oxidation states	2,1, −2​(a mildlybasicoxide)
Electronegativity	Pauling scale: 1.69
Ionization energies	1st: 867.8 kJ/mol 2nd: 1631.4 kJ/mol 3rd: 3616 kJ/mol
Atomic radius	empirical: 151pm
Covalent radius	144±9 pm
Van der Waals radius	158 pm
Miscellanea
Crystal structure	​hexagonal close-packed(hcp) Hexagonal close packed crystal structure for cadmium
Speed of soundthin rod	2310 m/s (at 20 °C)
Thermal expansion	30.8 µm/(m·K) (at 25 °C)
د تودوخې تېرېدنه	96.6 W/(m·K)
Electrical resistivity	72.7 nΩ·m (at 22 °C)
Magnetic ordering	diamagnetic
Magnetic susceptibility(χmol)	−19.8·10−6cm3/mol
Young's modulus	50 GPa
Shear modulus	19 GPa
Bulk modulus	42 GPa
Poisson ratio	0.30
Mohs hardness	2.0
Brinell hardness	203–220 MPa
CAS Number	7440-43-9
History
Discoveryand first isolation	Karl Samuel Leberecht HermannandFriedrich Stromeyer(1817)
Named by	Friedrich Stromeyer(1817)
Mainisotopes of cadmium
آيسو­ټوپ Abun­dance نیم ژوند(t1/2) Decay mode Pro­duct 106Cd 1.25% stable 107Cd syn 6.5 h ε 107Ag 108Cd 0.89% stable 109Cd syn 462.6 d ε 109Ag 110Cd 12.47% stable 111Cd 12.80% stable 112Cd 24.11% stable 113Cd 12.23% 7.7×1015y β− 113In 114Cd 28.75% stable 115Cd syn 53.46 h β− 115In 116Cd 7.51% 3.1×1019y β−β− 116Sn

کادميوم(پهانگرېزي:Cadmium) لهکیمیاوي عناصروڅخه یو دی چې پهتناوبي جدولکې دCdسمبول او ۴۸اتمي شمېرېپه وسیله ښودل شوی دی.

سرچينې

دا ليکنه نابشپړه ده، تاسې ددې ليکنې پهبشپړولوکې د ويکيپېډيا سره مرسته کولای شئ.