Gull

79 PlatinGullKiksilvur
Ag

Au

Rg

Skeiðbundna skipanin
Útsjónd

{{{Útsjónd}}}
Alment
Navn: Gull
Evnafrøðiligt tekn: Au
Atomnummar: 79
Elektronsamanseting: [Xe] 4f14 5d10 6s1
Elektronir pr. skal: 2, 8, 18, 32, 18, 1
Atomradius: 135 pm
Kovalent radius: 144 pm
Van der Waals radius: 166 pm
Evnafrøðiligir eginleikar
Oxidatiónstrin: 3, 1
Elektronegativitetur: 2,54 (Paulings skala)
Alisfrøðiligir eginleikar
Krystalstrukturur: Kubiskt, f-sentrerað
Evnisnøgd: 19,3 g/cm3
Massefylde på væskeform: 17,31 g/cm3
Kókipunkt: 2856 °C
Kritiskt punkt: –267,96 °C, 227 kPa
Smeltihiti: {{{Smeltihiti}}} kJ/mol
Guvingarhiti: 324 kJ/mol
Evnishiti: 25,418 Jmol–1K–1
Hitaleiðing: 318 Wm–1K–1
Hitavíðkan: 14,2
Elektriskur resistivitetur: 22,14 n
Magnetiskir eginleikar: ongi dáta
Mekaniskir eginleikar
Mekaniskir eginleikar
Youngs modul: 78 GPa
Forskydningsmodul: 27 GPa
Kompressibilitetsmodul: 220 GPa
Poissons forhold: 0,44
Herðan (Mohs' skala): 2,5
Herðan (Vickers): 216 MPa
Herðan (Brinell): 2450 MPa

Gulllatíni aurum) er frumevni nummar 79 í tí skeiðbundnu skipanini, og hevur tað evnafrøðiliga súmbolið Au: Undir vanligum trýst- og temperaturviðurskiftum er hetta Yvirgangsmetallið sum eitt sera tungt, gult metal, sum er lætt at broyta skap á.

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