Neptunium

Neptunium sī 1 ê hoà-ha̍k goân-sò͘. I ê goân-chú-hoan sī 93, hoà-ha̍k hû-hō sī Np.

Neptunium,  ₉₃Np

Ki-pún sèng-chit
Miâ, hû-hō	neptunium, Np
Gōa-hêng	silvery metallic
Neptunium tī chiu-kî-piáu lāi ê ūi-tì
Pm ↑ Np ↓ (Uqp) uranium ← neptunium → plutonium
Goân-chú-hoan	93
Goân-chú-liōng	(237)
Goân-sò͘ lūi-pia̍t	actinium-hē
Cho̍k, hun-khu	n/a, f khu
Chiu-kî	tē 7 chiu-kî
Tiān-chú pâi-lia̍t	[Rn] 5f4 6d1 7s2
per shell	2, 8, 18, 32, 22, 9, 2
Bu̍t-lí sèng-chit
Siòng	solid
Iûⁿ-tiám	912±3 K ​(639±3 °C, ​1182±5 °F)
Hut-tiám	4447 K ​(4174 °C, ​7545 °F) (extrapolated)
Bi̍t-tō͘  (sek-un)	alpha: 20.45 g·cm−3 accepted standard value: 19.38 g·cm−3
Iûⁿ-hoà-jia̍t	5.19 kJ·mol−1
Cheng-hoat-jia̍t	336 kJ·mol−1
Jia̍t-iông-liōng	29.46 J·mol−1·K−1
cheng-khì-ap P (Pa) 1 10 100 1 k 10 k 100 k tī T (K) 2194 2437
Goân-chú sèng-chit
Sng-hòa-sò͘	7, 6, 5, 4, 3, 2 ​(an amphoteric oxide)
Tiān-hū-tō͘	Pauling scale: 1.36
Tiān-lī-lêng	1st: 604.5 kJ·mol−1
Goân-chú pòaⁿ-kèng	empirical: 155 pm
Kiōng-kè pòaⁿ-kèng	190±1 pm
Cha̍p-lio̍k
Chiⁿ-thé kò͘-chō	​orthorhombic
Jia̍t-thoân-tō-lu̍t	6.3 W·m−1·K−1
Tiān-chó͘-lu̍t	1.220 µΩ·m (at 22 °C)
Chû-sèng	paramagnetic
CAS teng-kì pian-hō	7439-99-8
Le̍k-sú
Hō-miâ	after planet Neptune, itself named after Roman god of the sea Neptune
Hoat-hiān	Edwin McMillan and Philip H. Abelson (1940)
Chòe ún-tēng ê tông-ūi-sò͘
Chú bûn-chiong: neptunium ê tông-ūi-sò͘
iso NA half-life DM DE (MeV) DP 235Np syn 396.1 d α 5.192 231Pa ε 0.124 235U 236Np syn 1.54×105 y ε 0.940 236U β− 0.940 236Pu α 5.020 232Pa 237Np trace 2.144×106 y α 4.959 233Pa 239Np trace 2.356 d β− 0.218 239Pu