Praseodymium sī 1 ê hoà-ha̍k goân-sò͘. I ê goân-chú-hoan sī 59, hoà-ha̍k hû-hō sī Pr.
Praseodymium, 59Pr
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Ki-pún sèng-chit |
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Miâ, hû-hō |
praseodymium, Pr |
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Gōa-hêng |
grayish white |
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Praseodymium tī chiu-kî-piáu lāi ê ūi-tì |
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|
Goân-chú-hoan |
59 |
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Goân-chú-liōng (±) |
140.90766(2)[1] |
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Goân-sò͘ lūi-pia̍t |
lanthanum-hē |
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Cho̍k, hun-khu |
n/a, f khu |
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Chiu-kî |
tē 6 chiu-kî |
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Tiān-chú pâi-lia̍t |
[Xe] 4f3 6s2 |
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per shell |
2, 8, 18, 21, 8, 2 |
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Bu̍t-lí sèng-chit |
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Siòng |
solid |
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Iûⁿ-tiám |
1208 K (935 °C, 1715 °F) |
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Hut-tiám |
3403 K (3130 °C, 5666 °F) |
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Bi̍t-tō͘ (sek-un) |
6.77 g·cm−3 |
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6.50 g·cm−3 |
Iûⁿ-hoà-jia̍t |
6.89 kJ·mol−1 |
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Cheng-hoat-jia̍t |
331 kJ·mol−1 |
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Jia̍t-iông-liōng |
27.20 J·mol−1·K−1 |
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cheng-khì-ap
P (Pa)
|
1
|
10
|
100
|
1 k
|
10 k
|
100 k
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tī T (K)
|
1771
|
1973
|
(2227)
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(2571)
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(3054)
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(3779)
| |
Goân-chú sèng-chit |
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Sng-hòa-sò͘ |
5, 4, 3, 2 (a mildly basic oxide) |
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Tiān-hū-tō͘ |
Pauling scale: 1.13 |
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Tiān-lī-lêng |
1st: 527 kJ·mol−1 2nd: 1020 kJ·mol−1 3rd: 2086 kJ·mol−1 |
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Goân-chú pòaⁿ-kèng |
empirical: 182 pm |
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Kiōng-kè pòaⁿ-kèng |
203±7 pm |
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Cha̍p-lio̍k |
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Chiⁿ-thé kò͘-chō |
double hexagonal close-packed (dhcp) |
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Siaⁿ-sok (sòe kùn-á) |
2280 m·s−1 (at 20 °C) |
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Jia̍t-phòng-tiòng |
α, poly: 6.7 µm·m−1·K−1 (at r.t.) |
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Jia̍t-thoân-tō-lu̍t |
12.5 W·m−1·K−1 |
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Tiān-chó͘-lu̍t |
α, poly: 0.700 µΩ·m (at r.t.) |
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Chû-sèng |
paramagnetic[2] |
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Young hē-sò͘ |
α form: 37.3 GPa |
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Shear hē-sò͘ |
α form: 14.8 GPa |
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Bulk hē-sò͘ |
α form: 28.8 GPa |
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Poisson pí |
α form: 0.281 |
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Vickers ngē-tō͘ |
250–745 MPa |
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Brinell ngē-tō͘ |
250–640 MPa |
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CAS teng-kì pian-hō |
7440-10-0 |
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Le̍k-sú |
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Hoat-hiān |
Carl Auer von Welsbach (1885) |
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Chòe ún-tēng ê tông-ūi-sò͘ |
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Chú bûn-chiong: praseodymium ê tông-ūi-sò͘ |
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Decay modes in parentheses have been predicted, but have not yet been observed |