ngoi-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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