Zirconium,  ₄₀Zr

ngoi-kôn
silvery white
Kî-pún sin-sit
Miàng, fù-ho	Zirconium, Zr
ngoi-hìn	silvery white
Zirconium chhai chû-khì-péu ke vi-chi
Ti ↑ Zr ↓ Hf yttrium ← Zirconium → niobium
ngièn-chṳ́ sì-sú	40
ngièn-chṳ́-liòng (±)	91.224(2)[1]
ngièn-su lui-phe̍t	ko-thu kîm-su̍k
Chhu̍k, fûn-khî	4 chhu̍k, d-block
chû-khì	period 5
thien-chṳ́ phài-lie̍t	[Kr] 4d2 5s2
per shell	2, 8, 18, 10, 2
vu̍t-lî sin-chṳt
Siông	ku-thí
yùng-tiám	2128 K ​(1855 °C, ​3371 °F)
pui-tiám	4650 K ​(4377 °C, ​7911 °F)
Me̍t-thu near Sit-vûn	6.52 g·cm−3
5.8 g·cm−3
Yùng-fa-ngie̍t	14 kJ·mol−1
Chîn-fat-ngie̍t	591 kJ·mol−1
Ngie̍t-yùng-liong	25.36 J·mol−1·K−1
chîn-hi-ap P (Pa) 1 10 100 1 k 10 k 100 k chhai T (K) 2639 2891 3197 3575 4053 4678
Ngièn-chṳ́ sin-chṳt
Yông-fa-su	4, 3, 2, 1, −2[2] ​(an amphoteric oxide)
Thien-fu-sin	Pauling scale: 1.33
Thien-lì-nèn	1st: 640.1 kJ·mol−1 2nd: 1270 kJ·mol−1 3rd: 2218 kJ·mol−1
Ngièn-chṳ́ pan-kang	empirical: 160 pm
Khiung-ka pan-kang	175±7 pm
Miscellanea
Chîn-thí keu-chho	​hexagonal close-packed (hcp)
Sâng-suk thin rod	3800 m·s−1 (at 20 °C)
Ngie̍t-phàng-chong	5.7 µm·m−1·K−1 (at 25 °C)
Ngie̍t-chhòn-thô-li̍t	22.6 W·m−1·K−1
Thien-chú-li̍t	421 nΩ·m (at 20 °C)
Chhṳ̀-sin	paramagnetic[3]
Young's modulus	88 GPa
Shear modulus	33 GPa
Bulk modulus	91.1 GPa
Poisson ratio	0.34
Mohs hardness	5.0
Vickers hardness	820–1800 MPa
Brinell hardness	638–1880 MPa
CAS Registry Number	7440-67-7
Le̍k-sú
Hí-miàng	after zircon, zargun زرگون meaning "gold-colored".
Fat-hien	Martin Heinrich Klaproth (1789)
First isolation	Jöns Jakob Berzelius (1824)
Chui vún-thin ke thùng-vi-su
Chú vùn-chông: Zirconium ke thùng-vi-su
iso NA half-life DM DE (MeV) DP 88Zr syn 83.4 d ε – 88Y γ 0.392D – 89Zr syn 78.4 h ε 89Y β+ 89Y γ – 90Zr 51.45% 90Zr is stable with 50 neutrons 91Zr 11.22% 91Zr is stable with 51 neutrons 92Zr 17.15% 92Zr is stable with 52 neutrons 93Zr trace 1.53×106 y β− 0.060 93Nb 94Zr 17.38% >1.1×1017 y (β−β−) 1.144 94Mo 96Zr 2.8% 2.0×1019 y[4] β−β− 3.348 96Mo (β−) – 96Nb
Decay modes in parentheses are predicted, but have not yet been observed

Zirconium (Hon-ngî: 鋯 gào) he yit-chúng fa-ho̍k ngièn-su, fa-ho̍k fù-ho vì Zr, ngièn-chṳ́ su-muk he 40.

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