Sésium, 55 Pabaosan (SEE -zee-əm Cingakan mas lémlém Bobot atom standar A r, std (Cs) 7002132905451960000♠ 132.905451 96 (6)[ 1]
Wilangan atom (Z ) 55 Watek golongan 1 (logam alkali) Période période 6 Blok blok-s Konpigurasi éléktron [Xé ] 6s1 Éléktron per kulit 2, 8, 18, 18, 8, 1 Pase ring STP padet Titik lebur 301.7 K (28.5 °C, 83.3 °F) Titik didih 944 K (671 °C, 1240 °F) Kapadetan (nampek s.r. ) 1.93 g/cm3 ri kala éncéh (ring t.l. ) 1.843 g/cm3 Titik kritis 1938 K, 9.4 MPa[ 2] Panes fusi 2.09 kJ/mol Panes panguapan 63.9 kJ/mol Kapasitas panes molar 32.210 J/(mol·K) Tekanan uap
P (Pa)
1
10
100
1 k
10 k
100 k
at T (K)
418
469
534
623
750
940
Paindikan oksidasi −1, +1 [ 3] basa kuat) Kaéléktronégatipan skala Pauling: 0.79 Wasa ionisasi ka-1: 375.7 kJ/mol ka-2: 2234.3 kJ/mol ka-3: 3400 kJ/mol Jeriji atom émpiris: 265 pm Jeriji kovalén 244±11 pm Jeriji Van der Waals 343 pm Garis spéktral saking sésiumRupa alami primordial Struktur kristal kubus mapusat badan (bcc) Ékspansi térmal 97 µm/(m⋅K) (ring 25 °C) Konduktivitas térmal 35.9 W/(m⋅K) Resistivitas listrik 205 nΩ⋅m (ring 20 °C) bacakan magnétik paramagnétik [ 4] Modulus Young 1.7 GPa Modulus Bulk 1.6 GPa Kakatosan Mohs 0.2 Kakatosan Brinell 0.14 MPa Nomor CAS 7440-46-2 Pangaranan saking Latin caesius , pelung langit, antuk warna spéktralné Panemuan Robert Bunsen miwah Gustav Kirchhoff (1860) Isolasi kapertama Carl Setterberg (1882)
Kategori:Sésium pustaka
Sésium (éjaan IUPAC Caésium [ 6] Césium ring Basa Inggris Amérika )[ note 1] datu kimia antuk simbol Cs miwah wilangan atom 55. Pinaka logam alkali sané bélék, mawarna mas masawang pérak antuk titik éncéh 28.5 °C (83.3 °F), manadosang satunggil saking limang datu logam sané éncéh ring utawi nampék suhu ruangan .[ note 2] rubidium miwah potasium . Logam pinih réaktip, Punika piroporik miwah maréaksi sareng toya prasida ring −116 °C (−177 °F).
↑ Caesium punika éjaan sané kanikayang olih Pasatuan Internasional Kimia Murni miwah Terapan (IUPAC).[ 7] Seka Kimia Amérika (ACS) sampun nganggén éjaan césium saking warsa 1921,[ 8] [ 9] Webster's New International Dictionary . Datu kaaranin saking kruna Latin caesius [ 10] caesius kaéja antuk ligatur æ cæsius ; asapunika, situnggil alternatip menawi ortografi kuno mangkin punika cæsium . Salantur nyané ring ae/oe vs e .↑ Sareng rubidium 39 °C (102 °F), fransium (kacawang 27 °C [81 °F]), rasa (−39 °C [−38 °F]), miwah gallium (30 °C [86 °F]); brom taler éncéh ring suhu ruangan (éncéh ring −7.2 °C [19.0 °F]), menawi inucap pinaka halogén miwah nénten logam. Sadurungné kopernikium miwah flérovium kanikakayang pinaka kakalihné logam gas ring suhu ruangan.
↑ Méija, Juris; et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry 88 (3): 265–91. doi :10.1515/pac-2015-0305 ↑ Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics CRC Press . p. 4.121. ISBN 1439855110 ↑ Dye, J. L. (1979). "Compounds of Alkali Metal Anions". Angewandte Chemie International Edition 18 (8): 587–598. doi :10.1002/anie.197905871 . ↑ "Magnetic susceptibility of the elements and inorganic compounds". Handbook of Chemistry and Physics (PDF) (édisi ka-87th). CRC press. ISBN 0-8493-0487-3 . Kaaksés 2010-09-26 . ↑ "NIST Radionuclide Half-Life Measurements" . NIST . Kaaksés 2011-03-13 .↑ "IUPAC Periodic Table of Elements" . International Union of Pure and Applied Chemistry .↑ Mal:RedBook2005 .↑ Coghill, Anne M.; Garson, Lorrin R., eds. (2006). The ACS Style Guide: Effective Communication of Scientific Information 127 . ISBN 978-0-8412-3999-9 ↑ Coplen, T. B.; Peiser, H. S. (1998). "History of the recommended atomic-weight values from 1882 to 1997: a comparison of differences from current values to the estimated uncertainties of earlier values" (PDF) . Pure Appl. Chem . 70 (1): 237–257. doi :10.1351/pac199870010237 . ↑ OED entry for "caesium" . Second edition, 1989; online version June 2012. Retrieved 07 Séptémber 2012. Earlier version first published in New English Dictionary , 1888.
