Boron, 5 boron (β-rhombohedral)
[ 1] Pabaosan (BOR -on Alotrop α-, β-rhombohedral, β-tetragonal (miwah liyanan ) Cingakan selem masawang soklat Bobot atom standar A r, std (B) [7001108059999999999♠ 10.8067001108210000000000♠ 10.8217001108100000000000♠ 10.81
Wilangan atom (Z ) 5 Watek golongan 13 (golongan boron) Période période 2 Blok blok-p Konpigurasi éléktron [Hé ] 2s2 2p1 Éléktron per kulit 2, 3 Pase ring STP padet Titik lebur 2349 K (2076 °C, 3769 °F) Titik didih 4200 K (3927 °C, 7101 °F) Kapadetan ri kala éncéh (ring t.l. ) 2.08 g/cm3 Panes fusi 50.2 kJ/mol Panes panguapan 508 kJ/mol Kapasitas panes molar 11.087 J/(mol·K) Tekanan uap
P (Pa)
1
10
100
1 k
10 k
100 k
at T (K)
2348
2562
2822
3141
3545
4072
Paindikan oksidasi −5, −1, 0,[ 2] +3 [ 3] [ 4] asam tenga) Kaéléktronégatipan skala Pauling: 2.04 Wasa ionisasi ka-1: 800.6 kJ/mol ka-2: 2427.1 kJ/mol ka-3: 3659.7 kJ/mol (malih ) Jeriji atom émpiris: 90 pm Jeriji kovalén 84±3 pm Jeriji Van der Waals 192 pm Garis spéktral saking boronRupa alami primordial Struktur kristal rombohédron Kagelisan swara pales tipis 16,200 m/s (ring 20 °C) Ékspansi térmal β form: 5–7 µm/(m⋅K) (ring 25 °C)[ 5] Konduktivitas térmal 27.4 W/(m⋅K) Resistivitas listrik ~106 Ω⋅m (ring 20 °C) bacakan magnétik diamagnetic [ 6] Karentanan magnétik molar 3005330000000000000♠ −6.7× 10−6 3 /mol[ 6] Kakatosan Mohs ~9.5 Nomor CAS 7440-42-8 Panemuan Joseph Louis Gay-Lussac and Louis Jacques Thénard [ 7] (30 Juni 1808) Isolasi kapertama Humphry Davy [ 8] (9 Juli 1808)
10 B 19.1–20.3% madaging ring sampel alami, sareng sisa jyané punika 11 B.[ 10] Kategori:Boron pustaka
Boron Boron silih tunggil datu kimia antuk simbol B miwah wilangan atom 5. Kaproduksi samian olih spalasi sunar kosmik miwah supernova miwah nénten olih nukléosintésis bintang , inucap datu kaakéhan akedik ring Tata Surya miwah ring kerak gumi .[ 11] [ 12]
↑ Van Setten et al. 2007, pp. 2460–1↑ Braunschweig, H.; Dewhurst, R. D.; Hammond, K.; Mies, J.; Radacki, K.; Vargas, A. (2012). "Ambient-Temperature Isolation of a Compound with a Boron-Boron Triple Bond". Science . 336 (6087): 1420–2. Bibcode :2012Sci...336.1420B . doi :10.1126/science.1221138 . PMID 22700924 . S2CID 206540959 . ↑ Zhang, K.Q.; Guo, B.; Braun, V.; Dulick, M.; Bernath, P.F. (1995). "Infrared Emission Spectroscopy of BF and AIF" (PDF) . J. Molecular Spectroscopy . 170 (1): 82. Bibcode :1995JMoSp.170...82Z . doi :10.1006/jmsp.1995.1058 . ↑ Melanie Schroeder. Eigenschaften von borreichen Boriden und Scandium-Aluminium-Oxid-Carbiden (PDF) (ring Jerman). p. 139. ↑ Holcombe Jr., C. E.; Smith, D. D.; Lorc, J. D.; Duerlesen, W. K.; Carpenter; D. A. (October 1973). "Physical-Chemical Properties of beta-Rhombohedral Boron". High Temp. Sci . 5 (5): 349–57. ↑ 6,0 6,1 Haynes, William M., ed. (2016). CRC Handbook of Chemistry and Physics CRC Press . p. 4.127. ISBN 9781498754293 ↑ Gay Lussac, J.L.; Thenard, L.J. (1808). "Sur la décomposition et la recomposition de l'acide boracique" . Annales de chimie . 68 : 169–174. ↑ Davy H (1809). "An account of some new analytical researches on the nature of certain bodies, particularly the alkalies, phosphorus, sulphur, carbonaceous matter, and the acids hitherto undecomposed: with some general observations on chemical theory" . Philosophical Transactions of the Royal Society of London . 99 : 39–104. doi :10.1098/rstl.1809.0005 . ↑ 9,0 9,1 "Atomic Weights and Isotopic Compositions for All Elements" . National Institute of Standards and Technology. Kaaksés 2008-09-21 .↑ Szegedi, S.; Váradi, M.; Buczkó, Cs. M.; Várnagy, M.; Sztaricskai, T. (1990). "Determination of boron in glass by neutron transmission method". Journal of Radioanalytical and Nuclear Chemistry Letters . 146 (3): 177. doi :10.1007/BF02165219 . ↑ "Q & A: Where does the element Boron come from?" . physics.illinois.edu . Kaarsipin saking versi asli tanggal 29 May 2012. Kaaksés 2011-12-04 .↑ "Boron" . Britannica encyclopedia .
