Tantalum

Tantalum sī 1 ê hoà-ha̍k goân-sò͘. I ê goân-chú-hoan sī 73, hoà-ha̍k hû-hō sī Ta.

Tantalum,  ₇₃Ta

Spectral lines of tantalum
Ki-pún sèng-chit
Miâ, hû-hō	tantalum, Ta
Gōa-hêng	gray blue
Tantalum tī chiu-kî-piáu lāi ê ūi-tì
Nb ↑ Ta ↓ Db hafnium ← tantalum → wolfram
Goân-chú-hoan	73
Goân-chú-liōng (±)	180.94788(2)
Goân-sò͘ lūi-pia̍t	kòe-tō͘ kim-sio̍k
Cho̍k, hun-khu	5 cho̍k, d khu
Chiu-kî	tē 6 chiu-kî
Tiān-chú pâi-lia̍t	[Xe] 4f14 5d3 6s2
per shell	2, 8, 18, 32, 11, 2
Bu̍t-lí sèng-chit
Siòng	solid
Iûⁿ-tiám	3290 K ​(3017 °C, ​5463 °F)
Hut-tiám	5731 K ​(5458 °C, ​9856 °F)
Bi̍t-tō͘  (sek-un)	16.69 g·cm−3
15 g·cm−3
Iûⁿ-hoà-jia̍t	36.57 kJ·mol−1
Cheng-hoat-jia̍t	753 kJ·mol−1
Jia̍t-iông-liōng	25.36 J·mol−1·K−1
cheng-khì-ap P (Pa) 1 10 100 1 k 10 k 100 k tī T (K) 3297 3597 3957 4395 4939 5634
Goân-chú sèng-chit
Sng-hòa-sò͘	5, 4, 3, 2, 1, −1, −3 ​(a mildly acidic oxide)
Tiān-hū-tō͘	Pauling scale: 1.5
Tiān-lī-lêng	1st: 761 kJ·mol−1 2nd: 1500 kJ·mol−1
Goân-chú pòaⁿ-kèng	empirical: 146 pm
Kiōng-kè pòaⁿ-kèng	170±8 pm
Cha̍p-lio̍k
Chiⁿ-thé kò͘-chō	​body-centered cubic (bcc) α-Ta
Chiⁿ-thé kò͘-chō	​tetragonal β-Ta
Siaⁿ-sok (sòe kùn-á)	3400 m·s−1 (at 20 °C)
Jia̍t-phòng-tiòng	6.3 µm·m−1·K−1 (at 25 °C)
Jia̍t-thoân-tō-lu̍t	57.5 W·m−1·K−1
Tiān-chó͘-lu̍t	131 nΩ·m (at 20 °C)
Chû-sèng	paramagnetic
Young hē-sò͘	186 GPa
Shear hē-sò͘	69 GPa
Bulk hē-sò͘	200 GPa
Poisson pí	0.34
Mohs ngē-tō͘	6.5
Vickers ngē-tō͘	870–1200 MPa
Brinell ngē-tō͘	440–3430 MPa
CAS teng-kì pian-hō	7440-25-7
Le̍k-sú
Hoat-hiān	Anders Gustaf Ekeberg (1802)
Recognized as a distinct element by	Heinrich Rose (1844)
Chòe ún-tēng ê tông-ūi-sò͘
Chú bûn-chiong: tantalum ê tông-ūi-sò͘
iso NA half-life DM DE (MeV) DP 177Ta syn 56.56 h ε 1.166 177Hf 178Ta syn 2.36 h ε 1.910 178Hf 179Ta syn 1.82 y ε 0.110 179Hf 180Ta syn 8.125 h ε 0.854 180Hf β− 0.708 180W 181Ta 99.988% – (α) 1.5259 177Lu 182Ta syn 114.43 d β− 1.814 182W 183Ta syn 5.1 d β− 1.070 183W
Decay modes in parentheses are predicted, but have not yet been observed