Pha̍k-kîm

Pha̍k-kîm,  ₇₈Pt

ngoi-kôn
silvery white
Kî-pún sin-sit
Miàng, fù-ho	Pha̍k-kîm, Pt
Yîn-ngî	platinum
ngoi-hìn	silvery white
Pha̍k-kîm chhai chû-khì-péu ke vi-chi
Pd ↑ Pt ↓ Ds iridium ← Pha̍k-kîm → kîm
ngièn-chṳ́ sì-sú	78
ngièn-chṳ́-liòng (±)	195.084(9)
ngièn-su lui-phe̍t	ko-thu kîm-su̍k
Chhu̍k, fûn-khî	10 chhu̍k, d-block
chû-khì	period 6
thien-chṳ́ phài-lie̍t	[Xe] 4f14 5d9 6s1
per shell	2, 8, 18, 32, 17, 1
vu̍t-lî sin-chṳt
Siông	ku-thí
yùng-tiám	2041.4 K ​(1768.3 °C, ​3214.9 °F)
pui-tiám	4098 K ​(3825 °C, ​6917 °F)
Me̍t-thu near Sit-vûn	21.45 g·cm−3
19.77 g·cm−3
Yùng-fa-ngie̍t	22.17 kJ·mol−1
Chîn-fat-ngie̍t	510 kJ·mol−1
Ngie̍t-yùng-liong	25.86 J·mol−1·K−1
chîn-hi-ap P (Pa) 1 10 100 1 k 10 k 100 k chhai T (K) 2330 (2550) 2815 3143 3556 4094
Ngièn-chṳ́ sin-chṳt
Yông-fa-su	6, 5, 4, 3, 2, 1, −1, −2, −3 ​(a mildly basic oxide)
Thien-fu-sin	Pauling scale: 2.28
Thien-lì-nèn	1st: 870 kJ·mol−1 2nd: 1791 kJ·mol−1
Ngièn-chṳ́ pan-kang	empirical: 139 pm
Khiung-ka pan-kang	136±5 pm
Van der Waals pan-kang	175 pm
Miscellanea
Chîn-thí keu-chho	​face-centered cubic (fcc)
Sâng-suk thin rod	2800 m·s−1 (at r.t.)
Ngie̍t-phàng-chong	8.8 µm·m−1·K−1 (at 25 °C)
Ngie̍t-chhòn-thô-li̍t	71.6 W·m−1·K−1
Thien-chú-li̍t	105 nΩ·m (at 20 °C)
Chhṳ̀-sin	paramagnetic
Tensile strength	125–240 MPa
Young's modulus	168 GPa
Shear modulus	61 GPa
Bulk modulus	230 GPa
Poisson ratio	0.38
Mohs hardness	3.5
Vickers hardness	400–550 MPa
Brinell hardness	300–500 MPa
CAS Registry Number	7440-06-4
Le̍k-sú
Hoat-kiàn kap siōng chá ê tông-ūi-sò͘	Antonio de Ulloa (1735)
Chui vún-thin ke thùng-vi-su
Chú vùn-chông: Pha̍k-kîm ke thùng-vi-su
iso NA half-life DM DE (MeV) DP 190Pt 0.014% 6.5×1011 y α 3.252 186Os 192Pt 0.782% >4.7×1016 y (α) 2.4181 188Os 193Pt syn 50 y ε – 193Ir 194Pt 32.967% – (α) 1.5045 190Os 195Pt 33.832% – (α) 1.1581 191Os 196Pt 25.242% – (α) 0.7942 192Os
Decay modes in parentheses are predicted, but have not yet been observed

Pha̍k-kîm (白金) fe̍t-chá ham-cho Pha̍k (鉑) he yit-tsúng Fa-ho̍k Ngièn-su, fa-ho̍k fù-ho vì Pt, ngièn-tsṳ́ su-muk he 78.