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.
Radium, 88Ra
 |
| Ki-pún sèng-chit |
|---|
| Miâ, hû-hō |
radium, Ra |
|---|
| Gōa-hêng |
silvery white metallic |
|---|
| Radium tī chiu-kî-piáu lāi ê ūi-tì |
|---|
|
|
| Goân-chú-hoan |
88 |
|---|
| Goân-chú-liōng |
(226) |
|---|
| Goân-sò͘ lūi-pia̍t |
kiⁿ-thó͘ kim-sio̍k |
|---|
| Cho̍k, hun-khu |
2 cho̍k, s khu |
|---|
| Chiu-kî |
tē 7 chiu-kî |
|---|
| Tiān-chú pâi-lia̍t |
[Rn] 7s2 |
|---|
| per shell |
2, 8, 18, 32, 18, 8, 2 |
|---|
| Bu̍t-lí sèng-chit |
|---|
| Siòng |
kò͘-thé |
|---|
| Iûⁿ-tiám |
973 K (700 °C, 1292 °F) (disputed) |
|---|
| Hut-tiám |
2010 K (1737 °C, 3159 °F) |
|---|
| Bi̍t-tō͘ (sek-un) |
5.5 g·cm−3 |
|---|
| Iûⁿ-hoà-jia̍t |
8.5 kJ·mol−1 |
|---|
| Cheng-hoat-jia̍t |
113 kJ·mol−1 |
|---|
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) |
|---|
| Tiān-hū-tō͘ |
Pauling scale: 0.9 |
|---|
| Tiān-lī-lêng |
1st: 509.3 kJ·mol−1
2nd: 979.0 kJ·mol−1 |
|---|
| Kiōng-kè pòaⁿ-kèng |
221±2 pm |
|---|
| Van der Waals pòaⁿ-kèng |
283 pm |
|---|
| Cha̍p-lio̍k |
|---|
| Chiⁿ-thé kò͘-chō |
body-centered cubic (bcc) |
|---|
| Jia̍t-thoân-tō-lu̍t |
18.6 W·m−1·K−1 |
|---|
| Tiān-chó͘-lu̍t |
1 µΩ·m (at 20 °C) |
|---|
| Chû-sèng |
nonmagnetic |
|---|
| CAS teng-kì pian-hō |
7440-14-4 |
|---|
| Le̍k-sú |
|---|
| Hoat-hiān |
Pierre Curie and Marie Curie (1898) |
|---|
| Siōng chá hû-lî |
Marie Curie (1910) |
|---|
| Chòe ún-tēng ê tông-ūi-sò͘ |
|---|
|
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
| |
