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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| Ki-pún sèng-chit |
|---|
| Miâ, hû-hō |
radium, Ra |
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| Gōa-hêng |
silvery white metallic |
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| Radium tī chiu-kî-piáu lāi ê ūi-tì |
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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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| Bu̍t-lí sèng-chit |
|---|
| 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 |
|
| Goân-chú sèng-chit |
|---|
| 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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| Cha̍p-lio̍k |
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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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| Le̍k-sú |
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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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| Chòe ún-tēng ê tông-ūi-sò͘ |
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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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