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Khā-lú-siúm, 20Ca
![](http://178.128.105.246/content-http-upload.wikimedia.org/wikipedia/commons/thumb/9/96/Calcium_unter_Argon_Schutzgasatmosph%C3%A4re.jpg/220px-Calcium_unter_Argon_Schutzgasatmosph%C3%A4re.jpg) |
![](http://178.128.105.246/content-http-upload.wikimedia.org/wikipedia/commons/thumb/2/21/Calcium_Spectrum.png/220px-Calcium_Spectrum.png)
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Ki-pún sèng-chit |
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Miâ, hû-hō |
Khā-lú-siúm, Ca |
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Eng-bûn |
calcium |
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Gōa-hêng |
dull gray, silver; with a pale yellow tint[1] |
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Khā-lú-siúm tī chiu-kî-piáu lāi ê ūi-tì |
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Goân-chú-hoan |
20 |
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Goân-chú-liōng (±) |
40.078(4)[2] |
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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 4 chiu-kî |
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Tiān-chú pâi-lia̍t |
[Ar] 4s2 |
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per shell |
2, 8, 8, 2 |
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Bu̍t-lí sèng-chit |
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Siòng |
kò͘-thé |
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Iûⁿ-tiám |
1115 K (842 °C, 1548 °F) |
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Hut-tiám |
1757 K (1484 °C, 2703 °F) |
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Bi̍t-tō͘ (sek-un) |
1.55 g·cm−3 |
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1.378 g·cm−3 |
Iûⁿ-hoà-jia̍t |
8.54 kJ·mol−1 |
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Cheng-hoat-jia̍t |
154.7 kJ·mol−1 |
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Jia̍t-iông-liōng |
25.929 J·mol−1·K−1 |
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cheng-khì-ap
P (Pa)
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1
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10
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100
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1 k
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10 k
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100 k
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tī T (K)
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864
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956
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1071
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1227
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1443
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1755
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Goân-chú sèng-chit |
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Sng-hòa-sò͘ |
+2, +1, −1[3] (a strongly basic oxide) |
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Tiān-hū-tō͘ |
Pauling scale: 1.00 |
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Tiān-lī-lêng |
1st: 589.8 kJ·mol−1 2nd: 1145.4 kJ·mol−1 3rd: 4912.4 kJ·mol−1 (more) |
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Goân-chú pòaⁿ-kèng |
empirical: 197 pm |
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Kiōng-kè pòaⁿ-kèng |
176±10 pm |
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Van der Waals pòaⁿ-kèng |
231 pm |
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Cha̍p-lio̍k |
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Chiⁿ-thé kò͘-chō |
face-centered cubic (fcc) |
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Siaⁿ-sok (sòe kùn-á) |
3810 m·s−1 (at 20 °C) |
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Jia̍t-phòng-tiòng |
22.3 µm·m−1·K−1 (at 25 °C) |
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Jia̍t-thoân-tō-lu̍t |
201 W·m−1·K−1 |
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Tiān-chó͘-lu̍t |
33.6 nΩ·m (at 20 °C) |
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Chû-sèng |
diamagnetic |
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Young hē-sò͘ |
20 GPa |
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Shear hē-sò͘ |
7.4 GPa |
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Bulk hē-sò͘ |
17 GPa |
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Poisson pí |
0.31 |
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Mohs ngē-tō͘ |
1.75 |
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Brinell ngē-tō͘ |
170–416 MPa |
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CAS teng-kì pian-hō |
7440-70-2 |
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Le̍k-sú |
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Hoat-hiān kap siōng chá ê tông-ūi-sò͘ |
Humphry Davy (1808) |
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Chòe ún-tēng ê tông-ūi-sò͘ |
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Chú bûn-chiong: Khā-lú-siúm ê tông-ūi-sò͘ |
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Decay modes in parentheses are predicted, but have not yet been observed |
Khā-lú-siúm (Ji̍t-pún-gí: カルシウム) sī 1 ê hoà-ha̍k goân-sò͘, goân-chú-hoan sī 20, hoà-ha̍k hû-hō sī Ca. I ê Eng-bûn sī Calcium, chia sû ùi Latin-gí calcis ("chio̍h-hoe") lâi.