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[kái goân-sú-bé]

79 platinummercury
Ag

Au

Rg
Au-TableImage.svg
It-poaⁿ sèng-chit
Miâ, Hû-hō, Goân-chú-hoan 金, Au, 79
Hun-lūi transition metals
Cho̍k, Chiu-kî, Khu 11, 6, d
Goā-hêng metallic yellow
Native gold nuggets.jpg
Goân-chú-liōng 196.966569(4) g/mol
Tiān-chú phoè-tì [Xe] 4f14 5d10 6s1
Ta̍k kai ê Tiān-chú 2, 8, 18, 32, 18, 1
Bu̍t-lí sèng-chit
Siòng solid
Bi̍t-tō͘ (oá sek-un) 19.3 g·cm−3
Iûⁿ-tiám ê e̍k-thé bi̍t-tō͘ 17.31 g·cm−3
Iûⁿ-tiám 1337.33 K
(1064.18 °C, 1947.52 °F)
Kún-tiám 3129 K
(2856 °C, 5173 °F)
Heat of fusion 12.55 kJ·mol−1
Khì-hoà-jia̍t 324 kJ·mol−1
Jia̍t-siaⁿ (25 °C) 25.418 J·mol−1·K−1
Cheng-khì-ap
P/Pa 1 10 100 1 k 10 k 100 k
at T/K 1646 1814 2021 2281 2620 3078
Goân-chú sèng-chit
Kiat-chiⁿ kiat-kò͘ cubic face centered
Ióng-hoà 3, 1
(amphoteric oxide)
Hù-tiān-tō͘ 2.54 (Pauling piau-tō͘)
lî-chú-hoà lêng-liōng 1st: 890.1 kJ/mol
2nd: 1980 kJ/mol
Goân-chú poàⁿ-kèng 135 pm
Goân-chú poàⁿ-kèng (calc.) 174 pm
Kiōng-kè poàⁿ-kèng 144 pm
Van der Waals poàⁿ-kèng 166 pm
Kî-thaⁿ sèng-chit
Chû-sèng hong-hiòng no data
Tiān-chó͘ (20 °C) 22.14 nΩ·m
Thoân-jia̍t-lu̍t (300 K) 318 W·m−1·K−1
Jia̍t-phòng-lu̍t (25 °C) 14.2 µm·m−1·K−1
Im-sok (po̍h phiáⁿ) (sek-un) (hard-drawn)
2030  m·s−1
Young bô͘-liōng 78 GPa
Chián-chhiat bô͘-liōng 27 GPa
Ap-chin bô͘-liōng 220 GPa
Poisson pí 0.44
Mohs tēng-tō͘ 2.5
Vickers tēng-tō͘ 216 MPa
Brinell tēng-tō͘ 2450 MPa
CAS hoan-hō 7440-57-5
Ū-miâ ê tông-ūi-sò͘
chham-khó: Au ê tông-ūi-sò͘
iso NA poàⁿ-kiám-kî DM DE (MeV) DP
195Au syn 186.10 d ε 0.227 195Pt
196Au syn 6.183 d ε 1.506 196Pt
β- 0.686 196Hg
197Au 100% Au ū 118 lia̍p tiong-chú ê ún-tēng tông-ūi-sò͘
198Au syn 2.69517 d β- 1.372 198Hg
199Au syn 3.169 d β- 0.453 199Hg
Chham-khó

Au (拉丁語: aurum)抑週期表內底的一種化學元素原子番79,Au和大份的化學物無作用,干焦ClF王水(aqua regia),和氰化物(cyanide)會佮Au起反應,另外,佇水銀(mercury)裡,Au嘛會溶去,硝酸(nitric acid)會共Au以外的金屬攏溶去,定hông提來試驗有Au抑無。

Au嘛號做黃金,是一種真重要的資源