Radium, 88Ra| ngoi-kôn |
|---|
silvery white metallic
 |
| Kî-pún sin-sit |
|---|
| Miàng, fù-ho |
Radium, Ra |
|---|
| ngoi-hìn |
silvery white metallic |
|---|
| Radium chhai chû-khì-péu ke vi-chi |
|---|
|
|
| ngièn-chṳ́ sì-sú |
88 |
|---|
| ngièn-chṳ́-liòng |
(226) |
|---|
| ngièn-su lui-phe̍t |
kán-thú kîm-su̍k |
|---|
| Chhu̍k, fûn-khî |
2 chhu̍k, s-block |
|---|
| chû-khì |
period 7 |
|---|
| thien-chṳ́ phài-lie̍t |
[Rn] 7s2 |
|---|
| per shell |
2, 8, 18, 32, 18, 8, 2 |
|---|
| vu̍t-lî sin-chṳt |
|---|
| Siông |
ku-thí |
|---|
| yùng-tiám |
973 K (700 °C, 1292 °F) (disputed) |
|---|
| pui-tiám |
2010 K (1737 °C, 3159 °F) |
|---|
| Me̍t-thu near Sit-vûn |
5.5 g·cm−3 |
|---|
| Yùng-fa-ngie̍t |
8.5 kJ·mol−1 |
|---|
| Chîn-fat-ngie̍t |
113 kJ·mol−1 |
|---|
chîn-hi-ap
| P (Pa) |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| chhai T (K) |
819 |
906 |
1037 |
1209 |
1446 |
1799 |
|
| Ngièn-chṳ́ sin-chṳt |
|---|
| Yông-fa-su |
2 (expected to have a strongly basic oxide) |
|---|
| Thien-fu-sin |
Pauling scale: 0.9 |
|---|
| Thien-lì-nèn |
1st: 509.3 kJ·mol−1
2nd: 979.0 kJ·mol−1 |
|---|
| Khiung-ka pan-kang |
221±2 pm |
|---|
| Van der Waals pan-kang |
283 pm |
|---|
| Miscellanea |
|---|
| Chîn-thí keu-chho |
body-centered cubic (bcc) |
|---|
| Ngie̍t-chhòn-thô-li̍t |
18.6 W·m−1·K−1 |
|---|
| Thien-chú-li̍t |
1 µΩ·m (at 20 °C) |
|---|
| Chhṳ̀-sin |
nonmagnetic |
|---|
| CAS Registry Number |
7440-14-4 |
|---|
| Le̍k-sú |
|---|
| Fat-hien |
Pierre Curie and Marie Curie (1898) |
|---|
| First isolation |
Marie Curie (1910) |
|---|
| Chui vún-thin ke thùng-vi-su |
|---|
|
Chú vùn-chông: Radium ke thùng-vi-su |
| iso |
NA |
half-life |
DM |
DE (MeV) |
DP |
| 223Ra |
trace |
11.43 d |
α |
5.99 |
219Rn |
| 224Ra |
trace |
3.6319 d |
α |
5.789 |
220Rn |
| 225Ra |
trace |
14.9 d |
β− |
0.356 |
225Ac |
| 226Ra |
trace |
1600 y |
α |
4.871 |
222Rn |
| 228Ra |
trace |
5.75 y |
β− |
0.046 |
228Ac |
|
Radium (Hon-ngî: 鐳 léi) he yit-chúng fa-ho̍k ngièn-su, fa-ho̍k fù-ho vì Ra, ngièn-chṳ́ su-muk he 88.
