Matlotlo a Molybdenum
| Nomoro ea athomo | 42 |
| Nomoro ea CAS | 7439-98-7 |
| Boima ba athomo | 95.94 |
| Sebaka sa ho qhibiliha | 2620°C |
| Sebaka sa ho belisa | 5560°C |
| Bolumo ba athomo | 0.0153 nm3 |
| Botenya ho 20 °C | 10.2g/cm³ |
| Sebopeho sa kristale | khubiki e shebaneng le 'mele |
| Sekoahelo sa lerako | 0.3147 [nm] |
| Bongata karolong e ka holimo ea Lefatše | 1.2 [g/t] |
| Lebelo la molumo | 5400 m/s (ho rt) (thupa e tšesaane) |
| Katoloso ea mocheso | 4.8 µm/(m·K) (ho 25 °C) |
| Ho khanna ha mocheso | 138 W/(m·K) |
| Ho hanyetsa motlakase | 53.4 nΩ·m (ka 20 °C) |
| Bothata ba Mohs | 5.5 |
| Ho thatafala ha Vickers | 1400-2740Mpa |
| Bothata ba Brinell | 1370-2500Mpa |
Molybdenum ke karolo ea lik'hemik'hale e nang le letšoao la Mo le nomoro ea athomo ea 42. Lebitso lena le tsoa ho Neo-Latin molybdaenum, ho tsoa ho Segerike sa Khale Μόλυβδος molybdos, e bolelang loto, kaha lirafshoa tsa eona li ne li ferekanngoa le lirafshoa tsa loto. Liminerale tsa Molybdenum li 'nile tsa tsejoa ho pholletsa le histori, empa karolo ena e ile ea sibolloa (ka kutloisiso ea ho e khetholla e le ntho e ncha ho tsoa matsoaing a lirafshoa tsa lirafshoa tse ling) ka 1778 ke Carl Wilhelm Scheele. Tšepe ena e ile ea aroloa ka lekhetlo la pele ka 1781 ke Peter Jacob Hjelm.
Molybdenum ha e hlahe ka tlhaho e le tšepe e lokolohileng Lefatšeng; e fumanoa feela maemong a fapaneng a oxidation limineraleng. Karolo e lokolohileng, tšepe e kang silevera e nang le cast e putsoa, e na le ntlha ea botšelela e phahameng ka ho fetisisa ea ho qhibiliha ho feta karolo efe kapa efe. E etsa li-carbide tse thata, tse tsitsitseng habonolo li-alloy, 'me ka lebaka lena boholo ba tlhahiso ea lefats'e ea karolo ena (hoo e ka bang 80%) e sebelisoa li-alloy tsa tšepe, ho kenyeletsoa li-alloy tse matla haholo le li-superalloy.
Metswako e mengata ea molybdenum e na le ho qhibiliha ho fokolang metsing, empa ha liminerale tse nang le molybdenum li kopana le oksijene le metsi, molybdate ion e hlahisoang ke MoO2-4 e qhibiliha haholo. Liindastering, metsoako ea molybdenum (hoo e ka bang 14% ea tlhahiso ea lefats'e ea element) e sebelisoa lits'ebetsong tsa khatello e phahameng le mocheso o phahameng e le mebala le li-catalyst.
Li-enzyme tse nang le molybdenum ke tsona tse atisang ho sebelisoa ke libaktheria tse bakang ho roba kamano ea lik'hemik'hale ho naetrojene ea sepakapaka nakong ea ho tiea ha naetrojene ea baeloji. Bonyane li-enzyme tse 50 tsa molybdenum li tsejoa libaktheria, limela le liphoofolong, leha li-enzyme tsa baktheria le tsa cyanobacterial feela li amehang ho tiiseng naetrojene. Li-nitrogenase tsena li na le molybdenum ka mokhoa o fapaneng le li-enzyme tse ling tsa molybdenum, tseo kaofela li nang le molybdenum e nang le oxidized ka botlalo ho molybdenum cofactor. Li-enzyme tsena tse fapaneng tsa molybdenum cofactor li bohlokoa ho libōpuoa tse phelang, 'me molybdenum ke karolo ea bohlokoa bakeng sa bophelo linthong tsohle tse phahameng tsa eukaryote, leha e se libaktheriang tsohle.
Thepa ea 'mele
Ka sebopeho sa yona se hlwekileng, molybdenum ke tshepe e bohlooho bo kang silefera e nang le boima ba Mohs ba 5.5, le boima bo tlwaelehileng ba athomo ba 95.95 g/mol. E na le ntlha ya ho qhibiliha ya 2,623 °C (4,753 °F); hara dielemente tse hlahang ka tlhaho, ke tantalum, osmium, rhenium, tungsten le carbon feela tse nang le dintlha tse phahameng tsa ho qhibiliha. E na le e 'ngoe ya di-coefficients tse tlase ka ho fetisisa tsa katoloso ya mocheso hara ditshipi tse sebediswang kgwebong. Matla a ho kgomarela a dithapo tsa molybdenum a eketseha ka makgetlo a ka bang 3, ho tloha ho hoo e ka bang 10 ho isa ho 30 GPa, ha bophara ba tsona bo fokotseha ho tloha ho ~50–100 nm ho isa ho 10 nm.
Litšobotsi tsa lik'hemik'hale
Molybdenum ke tšepe ea phetoho e nang le electronegativity ea 2.16 sekaleng sa Pauling. Ha e bonahale e arabela le oksijene kapa metsi mochesong oa kamore. Oxidation e fokolang ea molybdenum e qala ho 300 °C (572 °F); oxidation e kholo e etsahala mochesong o kaholimo ho 600 °C, e leng se fellang ka molybdenum trioxide. Joalo ka litšepe tse ngata tse boima tsa phetoho, molybdenum e bontša tšekamelo e nyane ea ho theha cation ka har'a tharollo ea metsi, leha cation ea Mo3+ e tsejoa tlas'a maemo a laoloang ka hloko.
Lihlahisoa tse Chesang tsa Molybdenum
