| ngoi-kôn |
|---|
|
bright, silvery metallic luster |
| Kî-pún sin-sit |
|---|
| Miàng, fù-ho |
protactinium, Pa |
|---|
| ngoi-hìn |
bright, silvery metallic luster |
|---|
| Protactinium chhai chû-khì-péu ke vi-chi |
|---|
|
|
| ngièn-chṳ́ sì-sú |
91 |
|---|
| ngièn-chṳ́-liòng (±) |
231.03588(2)[1] |
|---|
| ngièn-su lui-phe̍t |
actinium-hi |
|---|
| Chhu̍k, fûn-khî |
n/a, f-block |
|---|
| chû-khì |
period 7 |
|---|
| thien-chṳ́ phài-lie̍t |
[Rn] 5f2 6d1 7s2 |
|---|
| per shell |
2, 8, 18, 32, 20, 9, 2 |
|---|
| vu̍t-lî sin-chṳt |
|---|
| Siông |
ku-thí |
|---|
| yùng-tiám |
1841 K (1568 °C, 2854 °F) |
|---|
| pui-tiám |
4300 K (4027 °C, 7280 °F) (?) |
|---|
| Me̍t-thu near Sit-vûn |
15.37 g·cm−3 |
|---|
| Yùng-fa-ngie̍t |
12.34 kJ·mol−1 |
|---|
| Chîn-fat-ngie̍t |
481 kJ·mol−1 |
|---|
| Ngièn-chṳ́ sin-chṳt |
|---|
| Yông-fa-su |
2, 3, 4, 5 (a weakly basic oxide) |
|---|
| Thien-fu-sin |
Pauling scale: 1.5 |
|---|
| Thien-lì-nèn |
1st: 568 kJ·mol−1 |
|---|
| Ngièn-chṳ́ pan-kang |
empirical: 163 pm |
|---|
| Khiung-ka pan-kang |
200 pm |
|---|
