Radium (Óa-im: "la-jí-ùm") sī 1 ê hoà-ha̍k goân-sò͘. I ê goân-chú-hoan sī 88, hoà-ha̍k hû-hō sī Ra.
Quick facts Ki-pún sèng-chit, Miâ, hû-hō ...
Radium, 88Ra |
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| Miâ, hû-hō | radium, Ra |
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| Gōa-hêng | silvery white metallic |
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| Goân-chú-hoan | 88 |
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| Goân-chú-liōng | (226) |
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| Goân-sò͘ lūi-pia̍t | kiⁿ-thó͘ kim-sio̍k |
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| Cho̍k, hun-khu | 2 cho̍k, s khu |
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| Chiu-kî | tē 7 chiu-kî |
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| Tiān-chú pâi-lia̍t | [Rn] 7s2 |
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| per shell | 2, 8, 18, 32, 18, 8, 2 |
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| Siòng | kò͘-thé |
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| Iûⁿ-tiám | 973 K (700 °C, 1292 °F) (disputed) |
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| Hut-tiám | 2010 K (1737 °C, 3159 °F) |
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| Bi̍t-tō͘ (sek-un) | 5.5 g·cm−3 |
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| Iûⁿ-hoà-jia̍t | 8.5 kJ·mol−1 |
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| Cheng-hoat-jia̍t | 113 kJ·mol−1 |
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cheng-khì-ap
| P (Pa) |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| tī T (K) |
819 |
906 |
1037 |
1209 |
1446 |
1799 |
|
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| Sng-hòa-sò͘ | 2 (expected to have a strongly basic oxide) |
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| Tiān-hū-tō͘ | Pauling scale: 0.9 |
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| Tiān-lī-lêng | 1st: 509.3 kJ·mol−1
2nd: 979.0 kJ·mol−1 |
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| Kiōng-kè pòaⁿ-kèng | 221±2 pm |
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| Van der Waals pòaⁿ-kèng | 283 pm |
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| Chiⁿ-thé kò͘-chō | body-centered cubic (bcc) |
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| Jia̍t-thoân-tō-lu̍t | 18.6 W·m−1·K−1 |
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| Tiān-chó͘-lu̍t | 1 µΩ·m (at 20 °C) |
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| Chû-sèng | nonmagnetic |
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| CAS teng-kì pian-hō | 7440-14-4 |
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| Hoat-hiān | Pierre Curie and Marie Curie (1898) |
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| Siōng chá hû-lî | Marie Curie (1910) |
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| Chú bûn-chiong: radium ê tông-ūi-sò͘ |
| 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 |
|
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