Phêng-sò͘

Phêng-sò͘ (Pâng-, 硼素) sī kì-hō B (Eng-gí: boron) ê goân-sò͘, goân-chú-hoan 5, goân-chú-liōng 10.81. I ū kim-sio̍k kap hui-kim-sio̍k chi kan ê sèng-chit.

Phêng-sò͘,  ₅B

boron (β-rhombohedral)[1]
Ki-pún sèng-chit
Miâ, hû-hō	Phêng-sò͘, B
Eng-bûn	boron
Phian-miâ	pâng-sò͘
Tông-sò͘-thé	α-, β-rhombohedral, β-tetragonal (and more)
Gōa-hêng	black-brown
Phêng-sò͘ tī chiu-kî-piáu lāi ê ūi-tì
– ↑ B ↓ Al beryllium ← Phêng-sò͘ → thoàⁿ-sò͘
Goân-chú-hoan	5
Goân-chú-liōng	10.81[2] (10.806–10.821)[3]
Goân-sò͘ lūi-pia̍t	lūi-kim-sio̍k
Cho̍k, hun-khu	13 cho̍k, p khu
Chiu-kî	tē 2 chiu-kî
Tiān-chú pâi-lia̍t	[He] 2s2 2p1
per shell	2, 3
Bu̍t-lí sèng-chit
Siòng	kò͘-thé
Iûⁿ-tiám	2349 K ​(2076 °C, ​3769 °F)
Hut-tiám	4200 K ​(3927 °C, ​7101 °F)
iông-tiám ê e̍k-thé bi̍t-tō͘	2.08 g·cm−3
Iûⁿ-hoà-jia̍t	50.2 kJ·mol−1
Cheng-hoat-jia̍t	508 kJ·mol−1
Jia̍t-iông-liōng	11.087 J·mol−1·K−1
cheng-khì-ap P (Pa) 1 10 100 1 k 10 k 100 k tī T (K) 2348 2562 2822 3141 3545 4072
Goân-chú sèng-chit
Sng-hòa-sò͘	3, 2, 1, −1, −5[4][5] ​(a mildly acidic oxide)
Tiān-hū-tō͘	Pauling scale: 2.04
Tiān-lī-lêng	1st: 800.6 kJ·mol−1 2nd: 2427.1 kJ·mol−1 3rd: 3659.7 kJ·mol−1 (more)
Goân-chú pòaⁿ-kèng	empirical: 90 pm
Kiōng-kè pòaⁿ-kèng	84±3 pm
Van der Waals pòaⁿ-kèng	192 pm
Cha̍p-lio̍k
Chiⁿ-thé kò͘-chō	​rhombohedral
Siaⁿ-sok (sòe kùn-á)	16,200 m·s−1 (at 20 °C)
Jia̍t-phòng-tiòng	β form: 5–7 µm·m−1·K−1 (at 25 °C)[6]
Jia̍t-thoân-tō-lu̍t	27.4 W·m−1·K−1
Tiān-chó͘-lu̍t	~106 Ω·m (at 20 °C)
Chû-sèng	diamagnetic[7]
Mohs ngē-tō͘	~9.5
CAS teng-kì pian-hō	7440-42-8
Le̍k-sú
Hoat-hiān	Joseph Louis Gay-Lussac and Louis Jacques Thénard[8] (30 June 1808)
Siōng chá hû-lî	Humphry Davy[9] (9 July 1808)
Chòe ún-tēng ê tông-ūi-sò͘
Chú bûn-chiong: Phêng-sò͘ ê tông-ūi-sò͘
iso NA half-life DM DE (MeV) DP 10B 19.9(7)% 10B is stable with 5 neutrons[10] 11B 80.1(7)% 11B is stable with 6 neutrons[10]
10B content may be as low as 19.1% and as high as 20.3% in natural samples. 11B is the remainder in such cases.[11]