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 |
---|