Hélium

Hélium, ₂Hé
Hélium; heliyum·
Pabaosan	/ˈhiːliəm/ (HEE-lee-əm)
Cingakan	gas tan mawarna, pacang dados bang-kudrang ri kala kagenahang miwah keni listrik mategangan tegeh
Bobot atom standar Ar, std(Hé)	4.002602(2)
Hélium ring tabél périodik
	hidrogén ← hélium → litium
Wilangan atom (Z)	2
Watek	golongan 18 (gas mulia)
Période	période 1
Blok	blok-s
Konpigurasi éléktron	1s2
Éléktron per kulit	2
Cecirén pisik
Pase ring STP	gas
Titik lebur	(pada 2,5 MPa) 0,95 K (−272,20 °C, −457,96 °F)
Titik didih	4,22 K (−268,93 °C, −452,07 °F)
Kapadetan (ring STP)	0,1786 g/L
ri kala éncéh (ring t.l.)	0,145 g/cm3
ri kala éncéh (ring t.d.)	0,125 g/cm3
Titik kritis	5,19 K, 0,227 MPa
Panes fusi	0,0138 kJ/mol
Panes panguapan	0,0829 kJ/mol
Kapasitas panes molar	5R/2 = 20,786 J/(mol·K)
Cecirén atom
Paindikan oksidasi	0
Kaéléktronégatipan	skala Pauling: tiada data
Jeriji kovalén	28 pm
Jeriji Van der Waals	140 pm
Cecirén liyanan
Rupa alami	primordial
Struktur kristal	susunan padat héksagon (hcp)
Kagelisan swara	972 m/s
Konduktivitas térmal	0,1513 W/(m⋅K)
bacakan magnétik	diamagnetik
Nomor CAS	7440-59-7
Lelintihan
Panemuan	P. Janssen miwah N. Lockyer (1868)
Isolasi kapertama	W. Ramsay, P. Cleve, miwah A. Langlet (1895)
Isotop utama hélium
	*Nilai atmosphir, kaakéhan matiosan ring makudang genah
	Kategori:Hélium; cingak; pabligbagan; uah; \| pustaka

Hélium (aksara Bali: heliyum·, saking kruna Greek: ἥλιος, romanized: Hélios, lit. 'Surya') silih tunggil datu kimia antuk simbol Hé miwah wilangan atom 2. Inucap tan mawarna, tan maambu, tan marasa, tan mabaya, gas muka, gas monatomik, kapartama ring seka gas mulia ring tabél périodik.^{[lower-alpha 1]} Titik didih punika pinih éndép riantara samian datu.

Hélium

Cutetan

↑ Makudang panyurat ngaiyegang panempatan helium ring kolom gas mulia, luwih seneng ngagenahang ring duur bérilium antuk logam alkali tanah. Dané ngamargiang manutin hélium konfigurasi éléktron 1s², sané kaanalogiyang sareng konfigurasi valensi logam alkali tanah ns², miwah selanturnyané ngenahang makudang indik spesifik sané luwih ketah ring hélium pantaraning bérilium.^[4]^[5]^[6]^[7]^[8] Menawi, klasifikasi hélium sareng gas mulia liyanan kantun nampekin universal, mawinan kalembaman sané sanget nampek sareng gas mulia ingan liyanan, néon miwah argon.^[9]

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.
↑ Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.
↑ "Hasil Pencarian". KBBI Daring. Kaaksés 2 Januari 2021.
↑ Grochala, Wojciech (1 November 2017). "On the position of helium and neon in the Periodic Table of Elements". Foundations of Chemistry. 20 (2018): 191–207. doi:10.1007/s10698-017-9302-7.
↑ Bent Weberg, Libby (18 January 2019). ""The" periodic table". Chemical & Engineering News. 97 (3). Kaaksés 27 March 2020.
↑ Grandinetti, Felice (23 April 2013). "Neon behind the signs". Nature Chemistry. 5 (2013): 438. Bibcode:2013NatCh...5..438G. doi:10.1038/nchem.1631. PMID 23609097. Kaaksés 27 March 2019.
↑ Kurushkin, Mikhail (2020). "Helium's placement in the Periodic Table from a crystal structure viewpoint". IUCrJ. 7 (4): 577–578. doi:10.1107/S2052252520007769. PMC 7340260. PMID 32695406. Kaaksés 19 June 2020.
↑ Labarca, Martín; Srivaths, Akash (2016). "On the Placement of Hydrogen and Helium in the Periodic System: A New Approach". Bulgarian Journal of Science Education. 25 (4): 514–530. Kaarsipin saking versi asli tanggal 29 November 2021. Kaaksés 19 June 2020.
↑ Lewars, Errol G. (5 Désémber 2008). Modeling Marvels: Computational Anticipation of Novel Molecules. Springer Science & Business Media. pp. 69–71. ISBN 978-1-4020-6973-4. Kaarsipin saking versi asli tanggal 19 Méi 2016.

[10] Makudang panyurat ngaiyegang panempatan helium ring kolom gas mulia, luwih seneng ngagenahang ring duur bérilium antuk logam alkali tanah. Dané ngamargiang manutin hélium konfigurasi éléktron 1s², sané kaanalogiyang sareng konfigurasi valensi logam alkali tanah ns², miwah selanturnyané ngenahang makudang indik spesifik sané luwih ketah ring hélium pantaraning bérilium.^[4]^[5]^[6]^[7]^[8] Menawi, klasifikasi hélium sareng gas mulia liyanan kantun nampekin universal, mawinan kalembaman sané sanget nampek sareng gas mulia ingan liyanan, néon miwah argon.^[9]

[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] Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.

[3] "Hasil Pencarian". KBBI Daring. Kaaksés 2 Januari 2021.

[4] Grochala, Wojciech (1 November 2017). "On the position of helium and neon in the Periodic Table of Elements". Foundations of Chemistry. 20 (2018): 191–207. doi:10.1007/s10698-017-9302-7.

[5] Bent Weberg, Libby (18 January 2019). ""The" periodic table". Chemical & Engineering News. 97 (3). Kaaksés 27 March 2020.

[6] Grandinetti, Felice (23 April 2013). "Neon behind the signs". Nature Chemistry. 5 (2013): 438. Bibcode:2013NatCh...5..438G. doi:10.1038/nchem.1631. PMID 23609097. Kaaksés 27 March 2019.

[7] Kurushkin, Mikhail (2020). "Helium's placement in the Periodic Table from a crystal structure viewpoint". IUCrJ. 7 (4): 577–578. doi:10.1107/S2052252520007769. PMC 7340260. PMID 32695406. Kaaksés 19 June 2020.

[8] Labarca, Martín; Srivaths, Akash (2016). "On the Placement of Hydrogen and Helium in the Periodic System: A New Approach". Bulgarian Journal of Science Education. 25 (4): 514–530. Kaarsipin saking versi asli tanggal 29 November 2021. Kaaksés 19 June 2020.

[9] Lewars, Errol G. (5 Désémber 2008). Modeling Marvels: Computational Anticipation of Novel Molecules. Springer Science & Business Media. pp. 69–71. ISBN 978-1-4020-6973-4. Kaarsipin saking versi asli tanggal 19 Méi 2016.

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