Neptunium

Neptunium, ₉₃Np
ngoi-kôn
	silvery metallic;
Kî-pún sin-sit
Miàng, fù-ho	neptunium, Np
ngoi-hìn	silvery metallic
Neptunium chhai chû-khì-péu ke vi-chi
	uranium ← neptunium → plutonium
ngièn-chṳ́ sì-sú	93
ngièn-chṳ́-liòng	(237)
ngièn-su lui-phe̍t	actinium-hi
Chhu̍k, fûn-khî	n/a, f-block
chû-khì	period 7
thien-chṳ́ phài-lie̍t	[Rn] 5f4 6d1 7s2
per shell	2, 8, 18, 32, 22, 9, 2
vu̍t-lî sin-chṳt
Siông	ku-thí
yùng-tiám	912±3 K (639±3 °C, 1182±5 °F)
pui-tiám	4447 K (4174 °C, 7545 °F) (extrapolated)
Me̍t-thu near Sit-vûn	alpha: 20.45 g·cm−3 ; accepted standard value: 19.38 g·cm−3
Yùng-fa-ngie̍t	5.19 kJ·mol−1
Chîn-fat-ngie̍t	336 kJ·mol−1
Ngie̍t-yùng-liong	29.46 J·mol−1·K−1
Ngièn-chṳ́ sin-chṳt
Yông-fa-su	7, 6, 5, 4, 3, 2 (an amphoteric oxide)
Thien-fu-sin	Pauling scale: 1.36
Thien-lì-nèn	1st: 604.5 kJ·mol−1
Ngièn-chṳ́ pan-kang	empirical: 155 pm
Khiung-ka pan-kang	190±1 pm

Neptunium he yit-chúng fa-ho̍k ngièn-su, fa-ho̍k fù-ho vì Np, ngièn-chṳ́ su-muk he 93.

↑ Sanchez, Rene G.; Loaiza, David J.; Kimpland, Robert H.; Hayes, David K.; Cappiello, Charlene C.; Myers, William L.; Jaegers, Peter J.; Clement, Steven D.; Butterfield, Kenneth B. "Criticality of a ²³⁷Np Sphere" (PDF). Japanese Atomic Energy Agency. 2014-08-06 chhà-khon.