Sélénium

Sélénium, ₃₄Sé
Sélénium; seleniyum·
Pabaosan	/sɪˈliːniəm/ (sə-LEE-nee-əm)
Cingakan	alotrop klau sané kacingak sekadi logam, abang, miwah ireng (nénten kagambarang)
Bobot atom standar Ar, std(Sé)	78.971(8)
Sélénium ring tabél périodik
	arsenik ← sélénium → brom
Wilangan atom (Z)	34
Watek	golongan 16 (kalkogén)
Période	période 4
Blok	blok-p
Konpigurasi éléktron	[Ar] 3d10 4s2 4p4
Éléktron per kulit	2, 8, 18, 6
Cecirén pisik
Pase ring STP	padet
Titik lebur	494 K (221 °C, 430 °F)
Titik didih	958 K (685 °C, 1265 °F)
Kapadetan (nampek s.r.)	gray: 4.81 g/cm3 ; alpha: 4.39 g/cm3 ; vitreous: 4.28 g/cm3
ri kala éncéh (ring t.l.)	3.99 g/cm3
Titik kritis	1766 K, 27.2 MPa
Panes fusi	gray: 6.69 kJ/mol
Panes panguapan	95.48 kJ/mol
Kapasitas panes molar	25.363 J/(mol·K)
Cecirén atom
Paindikan oksidasi	−2, −1, 0, +1, +2, +3, +4, +5, +6 (oksida asam kuat)
Kaéléktronégatipan	skala Pauling: 2.55
Wasa ionisasi	ka-1: 941.0 kJ/mol ; ka-2: 2045 kJ/mol ; ka-3: 2973.7 kJ/mol ; ;
Jeriji atom	émpiris: 120 pm
Jeriji kovalén	120±4 pm
Jeriji Van der Waals	190 pm
Cecirén liyanan
Rupa alami	primordial
Struktur kristal	trigon
Kagelisan swara pales tipis	3350 m/s (ring 20 °C)
Ékspansi térmal	amorphous: 37 µm/(m⋅K) (ring 25 °C)
Konduktivitas térmal	amorphous: 0.519 W/(m⋅K)
bacakan magnétik	diamagnétik
Karentanan magnétik molar	−25.0×10−6 cm3/mol (298 K)
Modulus Young	10 GPa
Modulus Shear	3.7 GPa
Modulus Bulk	8.3 GPa
Rasio Poisson	0.33
Kakatosan Mohs	2.0
Kakatosan Brinell	736 MPa
Nomor CAS	7782-49-2
Lelintihan
Pangaranan	mawit Séléné, Dewi bulan Yunani
Panemuan miwah isolasi kapertama	Jöns Jakob Berzelius miwah Johann Gottlieb Gahn (1817)
Isotop utama sélénium
γ	–
γ	–
	Kategori:Sélénium; cingak; pabligbagan; uah; \| pustaka

Sélénium silih tunggil datu kimia antuk simbol Sé miwah wilangan atom 34. Punika tan logam (tan ketah kaaranin métaloid) antuk datu sané magenah ring duur miwah metén ring tabél périodik, urirang miwah téllurium, taler sekadi arsenik. Punika kalah kawéntenang ring rupa datu utawi manados senyawa wijih murni ring kerak gumi. Sélénium—saking Basa Yunani Kuna σελήνη (selḗnē) "Wulan" – katemuin warsa 1817 olih Jöns Jacob Berzelius, sané nyutetin kapatehan datu anyar sareng téllurium sané katemuin sadurungné (kaaranin mawit Gumi).

Pustaka

↑ 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.
↑ A Se(0) atom has been identified using DFT in [ReOSe(2-pySe)₃]; see Cargnelutti, Roberta; Lang, Ernesto S.; Piquini, Paulo; Abram, Ulrich (2014). "Synthesis and structure of [ReOSe(2-Se-py)3]: A rhenium(V) complex with selenium(0) as a ligand". Inorganic Chemistry Communications. 45: 48–50. doi:10.1016/j.inoche.2014.04.003. ISSN 1387-7003.
↑ Mal:Greenwood&Earnshaw
↑ Magnetic susceptibility of the elements and inorganic compounds, ring Lide, D. R., ed. (2005). CRC Handbook of Chemistry and Physics (édisi ka-86). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5.
↑ Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4.

[CIAAW2013-1] 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.

[2] A Se(0) atom has been identified using DFT in [ReOSe(2-pySe)₃]; see Cargnelutti, Roberta; Lang, Ernesto S.; Piquini, Paulo; Abram, Ulrich (2014). "Synthesis and structure of [ReOSe(2-Se-py)3]: A rhenium(V) complex with selenium(0) as a ligand". Inorganic Chemistry Communications. 45: 48–50. doi:10.1016/j.inoche.2014.04.003. ISSN 1387-7003.

[3] Mal:Greenwood&Earnshaw

[4] Magnetic susceptibility of the elements and inorganic compounds, ring Lide, D. R., ed. (2005). CRC Handbook of Chemistry and Physics (édisi ka-86). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5.

[5] Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4.

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