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₅₅Cs
Sesium
55CsSesium
	Sampel sesium di dalam ampul kaca
	Garis spektrum sesium
Sifat umum
Pengucapan	/sésium/; /sèsium/;
Penampilan	emas pucat
Sesium dalam tabel periodik
	xenon ← sesium → barium
Nomor atom (Z)	55
Golongan	golongan 1 (logam alkali)
Periode	periode 6
Blok	blok-s
Kategori unsur	logam alkali
Berat atom standar (Ar)	132,90545196±0,00000006; 132,91±0,01 (diringkas);
Konfigurasi elektron	[Xe] 6s1
Elektron per kelopak	2, 8, 18, 18, 8, 1
Sifat fisik
Fase pada STS (0 °C dan 101,325 kPa)	padat
Titik lebur	301,7 K (28,5 °C, 83,3 °F)
Titik didih	944 K (671 °C, 1240 °F)
Kepadatan mendekati s.k.	1,93 g/cm3
saat cair, pada t.l.	1,843 g/cm3
Titik kritis	1938 K, 9,4 MPa
Kalor peleburan	2,09 kJ/mol
Kalor penguapan	63,9 kJ/mol
Kapasitas kalor molar	32,210 J/(mol·K)
Sifat atom
Bilangan oksidasi	−1, +1 (oksida basa kuat)
Elektronegativitas	Skala Pauling: 0,79
Energi ionisasi	ke-1: 375,7 kJ/mol ; ke-2: 2234,3 kJ/mol ; ke-3: 3400 kJ/mol
Jari-jari atom	empiris: 265 pm
Jari-jari kovalen	244±11 pm
Jari-jari van der Waals	343 pm
Lain-lain
Kelimpahan alami	primordial
Struktur kristal	kubus berpusat badan (bcc)
Ekspansi kalor	97 µm/(m·K) (suhu 25 °C)
Konduktivitas termal	35,9 W/(m·K)
Resistivitas listrik	205 nΩ·m (suhu 20 °C)
Arah magnet	paramagnetik
Modulus Young	1,7 GPa
Modulus curah	1,6 GPa
Skala Mohs	0,2
Skala Brinell	0,14 MPa
Nomor CAS	7440-46-2
Sejarah
Penamaan	dari bahasa Latin caesius, 'abu-abu kebiruan', karena warna spektrumnya
Penemuan	R. Bunsen dan G. Kirchhoff (1860)
Isolasi pertama	C. Setterberg (1882)
Isotop sesium yang utama
β−	134Ba
	lihat; bicara; sunting; \| referensi \| di Wikidata

₁₁₁Rg
Roentgenium
111RgRoentgenium
	Konfigurasi elektron roentgenium
Sifat umum
Pengucapan	/rontgènium/; /roèntgènium/;
Penampilan	keperakan (diprediksi)
Roentgenium dalam tabel periodik
	darmstadtium ← roentgenium → kopernisium
Nomor atom (Z)	111
Golongan	golongan 11
Periode	periode 7
Blok	blok-d
Kategori unsur	tak diketahui, mungkin logam transisi
Nomor massa	[282] (belum dikonfirmasi: 286)
Konfigurasi elektron	[Rn] 5f14 6d9 7s2 (diprediksi)
Elektron per kelopak	2, 8, 18, 32, 32, 17, 2 (diprediksi)
Sifat fisik
Fase pada STS (0 °C dan 101,325 kPa)	padat (diprediksi)
Kepadatan mendekati s.k.	22–24 g/cm3 (diprediksi)
Sifat atom
Bilangan oksidasi	(−1), (+1), (+3), (+5), (+7) (diprediksi)
Energi ionisasi	ke-1: 1020 kJ/mol ; ke-2: 2070 kJ/mol ; ke-3: 3080 kJ/mol ; (artikel) (semuanya merupakan perkiraan)
Jari-jari atom	empiris: 138 pm (diprediksi)
Jari-jari kovalen	121 pm (diperkirakan)
Lain-lain
Kelimpahan alami	sintetis
Struktur kristal	kubus berpusat badan (bcc) ; (diprediksi)
Nomor CAS	54386-24-2
Sejarah
Penamaan	dari Wilhelm C. Röntgen
Penemuan	Gesellschaft für Schwerionenforschung (1994)
Isotop roentgenium yang utama
SF
α (10%)	277Mt
	lihat; bicara; sunting; \| referensi \| di Wikidata

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←

iso0Rg

ibox E

wd:Q1272

→ H

Referensi

^ ^a ^b Turler, A. (2004). "Gas Phase Chemistry of Superheavy Elements" (PDF). Journal of Nuclear and Radiochemical Sciences. 5 (2): R19 – R25.
^ ^a ^b ^c ^d Hoffman, Darleane C.; Lee, Diana M.; Pershina, Valeria (2006). "Transactinides and the future elements". Dalam Morss; Edelstein, Norman M.; Fuger, Jean (ed.). The Chemistry of the Actinide and Transactinide Elements (Edisi 3). Dordrecht, The Netherlands. ISBN 978-1-4020-3555-5. Pemeliharaan CS1: Lokasi tanpa penerbit (link)
^ ^a ^b Östlin, A.; Vitos, L. (2011). "First-principles calculation of the structural stability of 6d transition metals". Physical Review B. 84 (11): 113104. Bibcode:2011PhRvB..84k3104O. doi:10.1103/PhysRevB.84.113104.
^ Gyanchandani, Jyoti; Sikka, S. K. (10 Mei 2011). "Physical properties of the 6 d -series elements from density functional theory: Close similarity to lighter transition metals". Physical Review B. 83 (17): 172101. Bibcode:2011PhRvB..83q2101G. doi:10.1103/PhysRevB.83.172101.
^ Kratz; Lieser (2013). Nuclear and Radiochemistry: Fundamentals and Applications (Edisi 3). hlm. 631.
^ ^a ^b Fricke, Burkhard (1975). "Superheavy elements: a prediction of their chemical and physical properties". Recent Impact of Physics on Inorganic Chemistry. Structure and Bonding. 21: 89–144. doi:10.1007/BFb0116498. ISBN 978-3-540-07109-9. Diakses tanggal 16 Juli 2022.
^ Conradie, Jeanet; Ghosh, Abhik (15 Juni 2019). "Theoretical Search for the Highest Valence States of the Coinage Metals: Roentgenium Heptafluoride May Exist". Inorganic Chemistry. 2019 (58): 8735–8738. doi:10.1021/acs.inorgchem.9b01139. PMID 31203606.
^ Chemical Data. Roentgenium - Rg, Royal Chemical Society
^ http://www.jinr.ru/posts/both-neutron-properties-and-new-results-at-she-factory/
^ Oganessian, Yuri Ts.; Abdullin, F. Sh.; Alexander, C.; et al. (2013-05-30). "Experimental studies of the ²⁴⁹Bk + ⁴⁸Ca reaction including decay properties and excitation function for isotopes of element 117, and discovery of the new isotope ²⁷⁷Mt". Physical Review C. 87 (54621). American Physical Society: 054621. Bibcode:2013PhRvC..87e4621O. doi:10.1103/PhysRevC.87.054621.
^ Oganessian, Yu. Ts.; et al. (2013). "Experimental studies of the ²⁴⁹Bk + ⁴⁸Ca reaction including decay properties and excitation function for isotopes of element 117, and discovery of the new isotope ²⁷⁷Mt". Physical Review C. 87 (5): 054621. Bibcode:2013PhRvC..87e4621O. doi:10.1103/PhysRevC.87.054621.
^ Khuyagbaatar, J.; Yakushev, A.; Düllmann, Ch. E.; et al. (2014). "⁴⁸Ca+²⁴⁹Bk Fusion Reaction Leading to Element Z=117: Long-Lived α-Decaying ²⁷⁰Db and Discovery of ²⁶⁶Lr". Physical Review Letters. 112 (17): 172501. Bibcode:2014PhRvL.112q2501K. doi:10.1103/PhysRevLett.112.172501. hdl:1885/148814. PMID 24836239.
^ Hofmann, S.; Heinz, S.; Mann, R.; et al. (2016). "Remarks on the Fission Barriers of SHN and Search for Element 120". Dalam Peninozhkevich, Yu. E.; Sobolev, Yu. G. (ed.). Exotic Nuclei: EXON-2016 Proceedings of the International Symposium on Exotic Nuclei. Exotic Nuclei. hlm. 155–164. doi:10.1142/9789813226548_0024. ISBN 9789813226555.
^ Hofmann, S.; Heinz, S.; Mann, R.; et al. (2016). "Review of even element super-heavy nuclei and search for element 120". The European Physics Journal A. 2016 (52): 180. Bibcode:2016EPJA...52..180H. doi:10.1140/epja/i2016-16180-4. S2CID 124362890.

Dokumentasi templat[lihat] [sunting] [riwayat] [segarkan]

Penggunaan

Referensi

^ (Indonesia) "Sesium". KBBI Daring. Diakses tanggal 17 Juli 2022.
^ (Inggris) Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (Edisi 92). Boca Raton, FL: CRC Press. hlm. 4.121. ISBN 1439855110.
^ (Inggris) Dye, J. L. (1979). "Compounds of Alkali Metal Anions". Angewandte Chemie International Edition. 18 (8): 587–598. doi:10.1002/anie.197905871.
^ (Inggris) "Magnetic susceptibility of the elements and inorganic compounds". Handbook of Chemistry and Physics (PDF) (Edisi 87). CRC press. ISBN 0-8493-0487-3. Diakses tanggal 29 Juli 2022.
^ (Inggris) "NIST Radionuclide Half-Life Measurements". NIST. Diakses tanggal 29 Juli 2022.

Dokumentasi di atas ditransklusikan dari Templat:Infobox element/doc.
Penyunting dapat melakukan uji coba pada halaman bak pasir dan kasus uji templat ini.
Subhalaman templat ini.

[e-conf-1] Turler, A. (2004). "Gas Phase Chemistry of Superheavy Elements" (PDF). Journal of Nuclear and Radiochemical Sciences. 5 (2): R19 – R25.

[Haire-2] Hoffman, Darleane C.; Lee, Diana M.; Pershina, Valeria (2006). "Transactinides and the future elements". Dalam Morss; Edelstein, Norman M.; Fuger, Jean (ed.). The Chemistry of the Actinide and Transactinide Elements (Edisi 3). Dordrecht, The Netherlands. ISBN 978-1-4020-3555-5. Pemeliharaan CS1: Lokasi tanpa penerbit (link)

[bcc-3] Östlin, A.; Vitos, L. (2011). "First-principles calculation of the structural stability of 6d transition metals". Physical Review B. 84 (11): 113104. Bibcode:2011PhRvB..84k3104O. doi:10.1103/PhysRevB.84.113104.

[density-4] Gyanchandani, Jyoti; Sikka, S. K. (10 Mei 2011). "Physical properties of the 6 d -series elements from density functional theory: Close similarity to lighter transition metals". Physical Review B. 83 (17): 172101. Bibcode:2011PhRvB..83q2101G. doi:10.1103/PhysRevB.83.172101.

[kratz-5] Kratz; Lieser (2013). Nuclear and Radiochemistry: Fundamentals and Applications (Edisi 3). hlm. 631.

[Fricke1975-6] Fricke, Burkhard (1975). "Superheavy elements: a prediction of their chemical and physical properties". Recent Impact of Physics on Inorganic Chemistry. Structure and Bonding. 21: 89–144. doi:10.1007/BFb0116498. ISBN 978-3-540-07109-9. Diakses tanggal 16 Juli 2022.

[hepta-7] Conradie, Jeanet; Ghosh, Abhik (15 Juni 2019). "Theoretical Search for the Highest Valence States of the Coinage Metals: Roentgenium Heptafluoride May Exist". Inorganic Chemistry. 2019 (58): 8735–8738. doi:10.1021/acs.inorgchem.9b01139. PMID 31203606.

[rsc-8] Chemical Data. Roentgenium - Rg, Royal Chemical Society

[9] ttp://www.jinr.ru/posts/both-neutron-properties-and-new-results-at-she-factory/

[2012e117-10] Oganessian, Yuri Ts.; Abdullin, F. Sh.; Alexander, C.; et al. (2013-05-30). "Experimental studies of the ²⁴⁹Bk + ⁴⁸Ca reaction including decay properties and excitation function for isotopes of element 117, and discovery of the new isotope ²⁷⁷Mt". Physical Review C. 87 (54621). American Physical Society: 054621. Bibcode:2013PhRvC..87e4621O. doi:10.1103/PhysRevC.87.054621.

[Mt-11] Oganessian, Yu. Ts.; et al. (2013). "Experimental studies of the ²⁴⁹Bk + ⁴⁸Ca reaction including decay properties and excitation function for isotopes of element 117, and discovery of the new isotope ²⁷⁷Mt". Physical Review C. 87 (5): 054621. Bibcode:2013PhRvC..87e4621O. doi:10.1103/PhysRevC.87.054621.

[12] Khuyagbaatar, J.; Yakushev, A.; Düllmann, Ch. E.; et al. (2014). "⁴⁸Ca+²⁴⁹Bk Fusion Reaction Leading to Element Z=117: Long-Lived α-Decaying ²⁷⁰Db and Discovery of ²⁶⁶Lr". Physical Review Letters. 112 (17): 172501. Bibcode:2014PhRvL.112q2501K. doi:10.1103/PhysRevLett.112.172501. hdl:1885/148814. PMID 24836239.

[EXON-13] Hofmann, S.; Heinz, S.; Mann, R.; et al. (2016). "Remarks on the Fission Barriers of SHN and Search for Element 120". Dalam Peninozhkevich, Yu. E.; Sobolev, Yu. G. (ed.). Exotic Nuclei: EXON-2016 Proceedings of the International Symposium on Exotic Nuclei. Exotic Nuclei. hlm. 155–164. doi:10.1142/9789813226548_0024. ISBN 9789813226555.

[Hofmann2016-14] Hofmann, S.; Heinz, S.; Mann, R.; et al. (2016). "Review of even element super-heavy nuclei and search for element 120". The European Physics Journal A. 2016 (52): 180. Bibcode:2016EPJA...52..180H. doi:10.1140/epja/i2016-16180-4. S2CID 124362890.

[15] (Indonesia) "Sesium". KBBI Daring. Diakses tanggal 17 Juli 2022.

[b92-16] (Inggris) Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (Edisi 92). Boca Raton, FL: CRC Press. hlm. 4.121. ISBN 1439855110.

[caeside-17] (Inggris) Dye, J. L. (1979). "Compounds of Alkali Metal Anions". Angewandte Chemie International Edition. 18 (8): 587–598. doi:10.1002/anie.197905871.

[magnet-18] (Inggris) "Magnetic susceptibility of the elements and inorganic compounds". Handbook of Chemistry and Physics (PDF) (Edisi 87). CRC press. ISBN 0-8493-0487-3. Diakses tanggal 29 Juli 2022.

[isotope-19] (Inggris) "NIST Radionuclide Half-Life Measurements". NIST. Diakses tanggal 29 Juli 2022.

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