Protactinium, 91Pangoi-kôn |
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bright, silvery metallic luster |
Kî-pún sin-sit |
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Miàng, fù-ho |
Protactinium, Pa |
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ngoi-hìn |
bright, silvery metallic luster |
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Protactinium chhai chû-khì-péu ke vi-chi |
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|
ngièn-chṳ́ sì-sú |
91 |
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ngièn-chṳ́-liòng (±) |
231.03588(2)[1] |
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ngièn-su lui-phe̍t |
actinium-hi |
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Chhu̍k, fûn-khî |
n/a, f-block |
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chû-khì |
period 7 |
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thien-chṳ́ phài-lie̍t |
[Rn] 5f2 6d1 7s2 |
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per shell |
2, 8, 18, 32, 20, 9, 2 |
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vu̍t-lî sin-chṳt |
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Siông |
ku-thí |
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yùng-tiám |
1841 K (1568 °C, 2854 °F) |
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pui-tiám |
4300 K (4027 °C, 7280 °F) (?) |
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Me̍t-thu near Sit-vûn |
15.37 g·cm−3 |
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Yùng-fa-ngie̍t |
12.34 kJ·mol−1 |
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Chîn-fat-ngie̍t |
481 kJ·mol−1 |
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Ngièn-chṳ́ sin-chṳt |
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Yông-fa-su |
2, 3, 4, 5 (a weakly basic oxide) |
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Thien-fu-sin |
Pauling scale: 1.5 |
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Thien-lì-nèn |
1st: 568 kJ·mol−1 |
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Ngièn-chṳ́ pan-kang |
empirical: 163 pm |
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Khiung-ka pan-kang |
200 pm |
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Miscellanea |
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Chîn-thí keu-chho |
tetragonal[2] |
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Ngie̍t-phàng-chong |
~9.9 µm·m−1·K−1[3] (at r.t.) |
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Ngie̍t-chhòn-thô-li̍t |
47 W·m−1·K−1 |
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Thien-chú-li̍t |
177 nΩ·m (at 0 °C) |
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Chhṳ̀-sin |
paramagnetic[4] |
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CAS Registry Number |
7440-13-3 |
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Le̍k-sú |
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Yi-chhet |
Dmitri Mendeleev (1869) |
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Hoat-kiàn kap siōng chá ê tông-ūi-sò͘ |
William Crookes (1900) |
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Named by |
Otto Hahn and Lise Meitner (1917–8) |
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Chui vún-thin ke thùng-vi-su |
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Chú vùn-chông: Protactinium ke thùng-vi-su |
iso
|
NA
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half-life
|
DM
|
DE (MeV)
|
DP
|
229Pa
|
syn
|
1.5 d
|
ε
|
0.311
|
229Th
|
230Pa
|
syn
|
17.4 d
|
ε
|
1.310
|
230Th
|
231Pa
|
100%
|
3.276×104 y
|
α
|
5.150
|
227Ac
|
232Pa
|
syn
|
1.31 d
|
β−
|
1.337
|
232U
|
233Pa
|
trace
|
26.967 d
|
β−
|
0.5701
|
233U
|
234Pa
|
trace
|
6.75 h
|
β−
|
2.195
|
234U
|
234mPa
|
trace
|
1.17 min
|
β−
|
2.29
|
234U
| |
Protactinium (Hon-ngî: 鏷 pú) he yit-chúng fa-ho̍k ngièn-su, fa-ho̍k fù-ho vì Pa, ngièn-chṳ́ su-muk he 91.