Kobalt
English: Cobalt

Kobalt iku sawijining anasir kimiah kanthi cihna Co lan nomer atom 27. Kaya nikel, kobalt ditemokaké ing Bumi kanthi bentuké campuran, sing sumber asalé saka mètèorit wesi. sipat iku atos, kemeling, lan wernané klawu wesi.

Cobalt,  27Co
cobalt chips
General properties
PangucapanRungokakéi/ˈkbɒlt/[1]
Wujudhard lustrous bluish gray metal
Bobot atom standar (Ar, standard)58.933194(4)[2]
Cobalt in the periodic table


Co

Rh
ironcobalt → nickel
Atomic number (Z)27
Groupgroup 9
Periodperiod 4
Element category  transition metal
Blokd-block
Konfigurasi èlèktron[Ar] 3d7 4s2
Electrons per shell
2, 8, 15, 2
Sipat angga
Phase at STPsolid
Melting point1768 K ​(1495 °C, ​2723 °F)
Boiling point3200 K ​(2927 °C, ​5301 °F)
Density (near r.t.)8.90 g/cm3
when liquid (at m.p.)8.86 g/cm3
Heat of fusion16.06 kJ/mol
Heat of vaporization377 kJ/mol
Molar heat capacity24.81 J/(mol·K)
P (Pa)1101001 k10 k100 k
at T (K)179019602165242327553198
Atomic properties
Oxidation states−3, −1, +1, +2, +3, +4, +5[3] ​(an amphoteric oxide)
ElectronegativityPauling scale: 1.88
Ionization energies
  • 1st: 760.4 kJ/mol
  • 2nd: 1648 kJ/mol
  • 3rd: 3232 kJ/mol
  • (more)
Atomic radiusempirical: 125 pm
Covalent radiusLow spin: 126±3 pm
High spin: 150±7 pm
Color lines in a spectral range
Spectral lines
Miscellanea
Crystal structure ​hexagonal close-packed (hcp)
Hexagonal close packed crystal structure for cobalt
Speed of sound thin rod4720 m/s (at 20 °C)
Thermal expansion13.0 µm/(m·K) (at 25 °C)
Thermal conductivity100 W/(m·K)
Electrical resistivity62.4 nΩ·m (at 20 °C)
Magnetic orderingferromagnetic
Young's modulus209 GPa
Shear modulus75 GPa
Bulk modulus180 GPa
Poisson ratio0.31
Mohs hardness5.0
Vickers hardness1043 MPa
Brinell hardness470–3000 MPa
CAS Number7440-48-4
History
Discovery and first isolationGeorg Brandt (1735)
Main isotopes of cobalt
Iso­topeAbun­danceHalf-life (t1/2)Decay modePro­duct
56Cosyn77.27 dεFe
57Cosyn271.79 dεFe
58Cosyn70.86 dεFe
59Co100%stable
60Cosyn5.2714 y, γNi
| references | in Wikidata
  • rujukan

Rujukan

  1. Oxford English Dictionary, 2nd Edition 1989.
  2. Meija, J.; et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry 88 (3): 265–91. 10.1515/pac-2015-0305. 
  3. Cithakan:Greenwood&Earnshaw2nd
Other Languages
Afrikaans: Kobalt
አማርኛ: ኮባልት
aragonés: Cobol
العربية: كوبالت
asturianu: Cobaltu
azərbaycanca: Kobalt
تۆرکجه: کوبالت
беларуская: Кобальт
беларуская (тарашкевіца)‎: Кобальт
български: Кобалт
भोजपुरी: कोबाल्ट
বাংলা: কোবাল্ট
བོད་ཡིག: གོ་བྰལ་
brezhoneg: Kobalt
bosanski: Kobalt
català: Cobalt
Mìng-dĕ̤ng-ngṳ̄: Gū (gĭng-sṳ̆k)
Cebuano: Kobalto
کوردی: کۆبالت
corsu: Cobaltu
čeština: Kobalt
Чӑвашла: Кобальт
Cymraeg: Cobalt
dansk: Kobolt
Deutsch: Cobalt
ދިވެހިބަސް: ކޮބާލްޓް
Ελληνικά: Κοβάλτιο
English: Cobalt
Esperanto: Kobalto
español: Cobalto
eesti: Koobalt
euskara: Kobalto
فارسی: کبالت
suomi: Koboltti
français: Cobalt
Nordfriisk: Koobalt
furlan: Cobalt
Gaeilge: Cóbalt
Gàidhlig: Còbalt
galego: Cobalto
ગુજરાતી: કોબાલ્ટ
Gaelg: Cobalt
客家語/Hak-kâ-ngî: Cobalt
עברית: קובלט
हिन्दी: कोबाल्ट
Fiji Hindi: Cobalt
hrvatski: Kobalt
magyar: Kobalt
հայերեն: Կոբալտ
Արեւմտահայերէն: Կոբաղդ
interlingua: Cobalt
Bahasa Indonesia: Kobalt
Ido: Kobalto
íslenska: Kóbolt
italiano: Cobalto
日本語: コバルト
la .lojban.: ridjinme
ქართული: კობალტი
Kabɩyɛ: Kobalti
қазақша: Кобальт
ಕನ್ನಡ: ಕೋಬಾಲ್ಟ್
한국어: 코발트
kurdî: Kobalt
коми: Кобальт
Кыргызча: Кобальт
Latina: Cobaltum
Lëtzebuergesch: Kobalt
Limburgs: Kobalt
Ligure: Cobalto
lumbaart: Cobalto
lietuvių: Kobaltas
latviešu: Kobalts
македонски: Кобалт
മലയാളം: കൊബാൾട്ട്
монгол: Кобальт
मराठी: कोबाल्ट
кырык мары: Кобальт
Bahasa Melayu: Kobalt
မြန်မာဘာသာ: ကိုဘော့ (ဒြပ်စင်)
эрзянь: Кобальт
Plattdüütsch: Kobalt
नेपाली: कोबाल्ट
नेपाल भाषा: कोबाल्ट
Nederlands: Kobalt
norsk nynorsk: Kobolt
norsk: Kobolt
Diné bizaad: Béésh łibáhí
occitan: Cobalt
Livvinkarjala: Kobal’tu
ଓଡ଼ିଆ: କୋବାଲ୍‌ଟ
ਪੰਜਾਬੀ: ਕੋਬਾਲਟ
पालि: कोबाल्ट
polski: Kobalt
Piemontèis: Cobalt
پنجابی: کوبالٹ
português: Cobalto
Runa Simi: Kubaltu
română: Cobalt
armãneashti: Cobaltu
русский: Кобальт
संस्कृतम्: कोबाल्ट
sicilianu: Cobbaltu
Scots: Cobaut
srpskohrvatski / српскохрватски: Kobalt
සිංහල: කොබෝල්ට්
Simple English: Cobalt
slovenčina: Kobalt
slovenščina: Kobalt
Soomaaliga: Kobalti
shqip: Kobalti
српски / srpski: Кобалт
Seeltersk: Cobalt
Sunda: Kobalt
svenska: Kobolt
Kiswahili: Kobalti
తెలుగు: కోబాల్ట్
тоҷикӣ: Кобалт
Tagalog: Kobalto
Türkçe: Kobalt
татарча/tatarça: Кобальт
ئۇيغۇرچە / Uyghurche: كوبالت
українська: Кобальт
اردو: کوبالٹ
oʻzbekcha/ўзбекча: Kobalt
vepsän kel’: Kobal't (himine element)
Tiếng Việt: Coban
walon: Cobalt
Winaray: Cobalto
吴语:
хальмг: Кобалтион
ייִדיש: קאבאלט
Yorùbá: Cobalt
中文:
文言:
Bân-lâm-gú: Cobalt
粵語: