Wolfram

Wolfram,  ₇₄W

ngoi-kôn
grayish white, lustrous
Kî-pún sin-sit
Miàng, fù-ho	Wolfram, W
phe̍t-miàng	tungsten
ngoi-hìn	grayish white, lustrous
Wolfram chhai chû-khì-péu ke vi-chi
Mo ↑ W ↓ Sg tantalum ← Wolfram → rhenium
ngièn-chṳ́ sì-sú	74
ngièn-chṳ́-liòng (±)	183.84(1)
ngièn-su lui-phe̍t	ko-thu kîm-su̍k
Chhu̍k, fûn-khî	6 chhu̍k, d-block
chû-khì	period 6
thien-chṳ́ phài-lie̍t	[Xe] 4f14 5d4 6s2
per shell	2, 8, 18, 32, 12, 2
vu̍t-lî sin-chṳt
Siông	ku-thí
yùng-tiám	3695 K ​(3422 °C, ​6192 °F)
pui-tiám	6203 K ​(5930 °C, ​10,706 °F)
Me̍t-thu near Sit-vûn	19.25 g·cm−3
17.6 g·cm−3
lìm-kie-tiám	13,892 K,  MPa
Yùng-fa-ngie̍t	35.3 kJ·mol−1
Chîn-fat-ngie̍t	774 kJ·mol−1
Ngie̍t-yùng-liong	24.27 J·mol−1·K−1
chîn-hi-ap P (Pa) 1 10 100 1 k 10 k 100 k chhai T (K) 3477 3773 4137 4579 5127 5823
Ngièn-chṳ́ sin-chṳt
Yông-fa-su	6, 5, 4, 3, 2, 1, 0, −1, −2, −4 ​(a mildly acidic oxide)
Thien-fu-sin	Pauling scale: 2.36
Thien-lì-nèn	1st: 770 kJ·mol−1 2nd: 1700 kJ·mol−1
Ngièn-chṳ́ pan-kang	empirical: 139 pm
Khiung-ka pan-kang	162±7 pm
Miscellanea
Chîn-thí keu-chho	​body-centered cubic (bcc)
Sâng-suk thin rod	4620 m·s−1 (at r.t.) (annealed)
Ngie̍t-phàng-chong	4.5 µm·m−1·K−1 (at 25 °C)
Ngie̍t-chhòn-thô-li̍t	173 W·m−1·K−1
Thien-chú-li̍t	52.8 nΩ·m (at 20 °C)
Chhṳ̀-sin	paramagnetic
Young's modulus	411 GPa
Shear modulus	161 GPa
Bulk modulus	310 GPa
Poisson ratio	0.28
Mohs hardness	7.5
Vickers hardness	3430–4600 MPa
Brinell hardness	2000–4000 MPa
CAS Registry Number	7440-33-7
Le̍k-sú
Hí-miàng	from German wolfram
Fat-hien	Carl Wilhelm Scheele (1781)
First isolation	Juan José Elhuyar and Fausto Elhuyar (1783)
Chui vún-thin ke thùng-vi-su
Chú vùn-chông: Wolfram ke thùng-vi-su
iso NA half-life DM DE (MeV) DP 180W 0.12% 1.8×1018 y α 2.516 176Hf 181W syn 121.2 d ε 0.188 181Ta 182W 26.50% >1.7×1020 y (α) 1.772 178Hf 183W 14.31% >8×1019 y (α) 1.680 179Hf 184W 30.64% >1.8×1020 y (α) 1.123 180Hf 185W syn 75.1 d β− 0.433 185Re 186W 28.43% >4.1×1018 y (α) 1.656 182Hf (β−β−) – 186Os
Decay modes in parentheses are predicted, but have not yet been observed

Wolfram (Hon-ngî: 鎢 wū) he yit-chúng fa-ho̍k ngièn-su, fa-ho̍k fù-ho vì W, ngièn-chṳ́ su-muk he 74.