Pilak

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Silver
47Ag
Cu

Ag

Au
palladiumsilvercadmium
Appearance
lustrous white metal

Electrolytically refined silver
General properties
Name, simbolo, kaiphan silver, Ag, 47
Pronunciation Plantilya:IPAc-en
Element category transition metal
Group, period, block 115, d
Standard atomic weight 107.8682
Electron configuration [Kr] 4d10 5s1
2, 8, 18, 18, 1
Electron shells of silver (2, 8, 18, 18, 1)
History
Discovery before 5000 BC
Physical properties
Phase solid
Density (near r.t.) 10.49 g·cm−3
Liquid density at m.p. 9.320 g·cm−3
Melting point 1234.93 K, 961.78 °C, 1763.2 °F
Boiling point 2435 K, 2162 °C, 3924 °F
Heat of fusion 11.28 kJ·mol−1
Heat of vaporization 250.58 kJ·mol−1
Molar heat capacity 25.350 J·mol−1·K−1
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 1283 1413 1575 1782 2055 2433
Atomic properties
Oxidation states 1, 2, 3 (amphoteric oxide)
Electronegativity 1.93 (Pauling scale)
Ionization energies 1st: 731.0 kJ·mol−1
2nd: 2070 kJ·mol−1
3rd: 3361 kJ·mol−1
Atomic radius 144 pm
Covalent radius 145±5 pm
Van der Waals radius 172 pm
Miscellanea
Crystal structure face-centered cubic
Silver has a face-centered cubic crystal structure
Magnetic ordering diamagnetic[1]
Electrical resistivity (20 °C) 15.87 nΩ·m
Thermal conductivity 429 W·m−1·K−1
Thermal diffusivity (300 K) 174 mm²/s
Thermal expansion (25 °C) 18.9 µm·m−1·K−1
Speed of sound (thin rod) (r.t.) 2680 m·s−1
Young's modulus 83 GPa
Shear modulus 30 GPa
Bulk modulus 100 GPa
Poisson ratio 0.37
Mohs hardness 2.5
Vickers hardness 251 MPa
Brinell hardness 206 MPa
CAS registry number 7440-22-4
Most stable isotopes
Main article: Isotopes of silver
iso NA half-life DM DE (MeV) DP
105Ag syn 41.2 d ε - 105Pd
γ 0.344, 0.280,
0.644, 0.443
-
106mAg syn 8.28 d ε - 106Pd
γ 0.511, 0.717,
1.045, 0.450
-
107Ag 51.839% 107Ag is stable with 60 neutrons
108mAg syn 418 y ε - 108Pd
IT 0.109 108Ag
γ 0.433, 0.614,
0.722
-
109Ag 48.161% 109Ag is stable with 62 neutrons
111Ag syn 7.45 d β 1.036, 0.694 111Cd
γ 0.342 -
t  h  u
· r

Ang pilak (silver) maoy usa ka elementong kemikal nga Ag ang minubo.

References[usba | edit source]

  1. Magnetic susceptibility of the elements and inorganic compounds in Lide, D. R., ed. (2005). CRC Handbook of Chemistry and Physics (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5.