Na waiwai o Molybdenum
| Helu atomika | 42 |
| Helu CAS | 7439-98-7 |
| ʻAtoma nui | 95.94 |
| Lae hehee | 2620°C |
| Lae paila | 5560°C |
| Ka nui atomika | 0.0153 nm3 |
| Māmā ma 20 °C | 10.2g/cm³ |
| ʻO ka hana aniani | cubic pili kino |
| Lattice mau | 0.3147 [nm] |
| Ka nui i loko o ka ʻōpala o ka Honua | 1.2 [g/t] |
| Ka māmā o ke kani | 5400 m/s (ma rt)(kookoo lahilahi) |
| Hoʻonui wela | 4.8 µm/(m·K) (ma 25 °C) |
| ʻO ke kau wela wela | 138 W/(m·K) |
| ʻAiʻa uila | 53.4 nΩ·m (ma 20 °C) |
| Mohs paakiki | 5.5 |
| ʻO ka paʻakikī o Vickers | 1400-2740Mpa |
| ʻO Brinell paʻakikī | 1370-2500Mpa |
ʻO ka molybdenum kahi mea kemika me ka hōʻailona Mo a me ka helu atomika 42. No ka Neo-Latin molybdaenum mai ka Helene kahiko ʻo Μόλυβδος molybdos, ʻo ia hoʻi ke alakaʻi, no ka mea, ua huikau ʻia kāna mau oka me nā ores kepau. Ua ʻike ʻia nā minerala Molybdenum i ka mōʻaukala, akā ua ʻike ʻia ka mea (ma ke ʻano o ka hoʻokaʻawale ʻana iā ia ma ke ʻano he mea hou mai nā paʻakai mineral o nā metala ʻē aʻe) i ka makahiki 1778 e Carl Wilhelm Scheele. Ua hoʻokaʻawale mua ʻia ka metala ma 1781 e Peter Jacob Hjelm.
ʻAʻole loaʻa maoli ka Molybdenum ma ke ʻano he metala manuahi ma ka Honua; loaʻa wale ia ma nā ʻano oxidation like ʻole i nā minerala. ʻO ka mea ʻokoʻa, he metala kala me ka hoʻolei hina, ʻo ke ono ka helu heheʻe kiʻekiʻe loa o kēlā me kēia mea. Hiki iā ia ke hana i nā carbide paʻa paʻa i loko o nā ʻāpana, a no kēia kumu i hoʻohana ʻia ai ka hapa nui o ka hana honua o ka mea (e pili ana i 80%) i nā mea hao kila, e komo pū me nā alloys ikaika kiʻekiʻe a me nā superalloys.
ʻO ka hapa nui o nā pūhui molybdenum he haʻahaʻa ka hoʻoheheʻe ʻana i ka wai, akā ke hoʻopili ʻia nā minela lawe molybdenum i ka oxygen a me ka wai, hiki ke hoʻoheheʻe ʻia ka molybdate ion MoO2-4. ʻO ka ʻenehana, hoʻohana ʻia nā pūhui molybdenum (e pili ana i 14% o ka hana honua o ka element) i nā noi kiʻekiʻe a me nā wela wela e like me nā puaʻa a me nā catalysts.
ʻO nā enzymes e lawe ana i ka molybdenum ka mea maʻamau maʻamau no ka haki ʻana i ka paʻa kemika i loko o ka naikokene molekula lewa i ke kaʻina o ka hoʻoponopono ʻana i ka naikokene biological. Ma kahi o 50 mau enzymes molybdenum i ʻike ʻia i kēia manawa i loko o ka bacteria, nā mea kanu, a me nā holoholona, ʻoiai ʻo nā enzyme bacterial a cyanobacterial wale nō i komo i ka hoʻoponopono nitrogen. Loaʻa i kēia mau nitrogenases ka molybdenum ma kahi ʻano ʻokoʻa mai nā enzyme molybdenum ʻē aʻe, aia nā mea āpau i loko o ka molybdenum oxidized piha i loko o kahi cofactor molybdenum. He mea koʻikoʻi kēia mau enzyme cofactor molybdenum i nā meaola, a ʻo ka molybdenum kahi mea pono no ke ola ma nā mea ola eukaryote kiʻekiʻe aʻe, ʻaʻole naʻe i loko o nā bacteria āpau.
Nā waiwai kino
Ma kona ʻano maʻemaʻe, ʻo ka molybdenum he metala hina hina me ka paʻakikī Mohs o 5.5, a me ke kaumaha atomic maʻamau o 95.95 g/mol. He wahi hehee kona 2,623 °C (4,753 °F); ʻO nā mea kūlohelohe maoli, ʻo tantalum wale nō, osmium, rhenium, tungsten, a me ke kalapona ka nui o nā helu heheʻe. Loaʻa iā ia kekahi o nā coefficient haʻahaʻa loa o ka hoʻonui wela ma waena o nā metala i hoʻohana ʻia i ke kālepa. Ke piʻi nei ka ikaika tensile o nā uea molybdenum ma kahi o 3 mau manawa, mai kahi o 10 a 30 GPa, ke emi iho ko lākou anawaena mai ~50-100 nm a 10 nm.
Nā waiwai kemika
ʻO ka Molybdenum kahi metala hoʻololi me ka electronegativity o 2.16 ma ka pālākiō Pauling. ʻAʻole ʻike ʻia me ka oxygen a i ʻole ka wai ma ke ana wela. Hoʻomaka ka oxidation nāwaliwali o ka molybdenum ma 300 °C (572 °F); ʻO ka nui o ka oxidation e loaʻa i nā mahana ma luna o 600 ° C, ka hopena i ka molybdenum trioxide. E like me nā metala hoʻololi koʻikoʻi, hōʻike ka molybdenum i ka makemake liʻiliʻi e hana i kahi cation i loko o ka wai wai, ʻoiai ua ʻike ʻia ka cation Mo3+ ma lalo o nā kūlana mālama pono.
Nā Huahana Wela o Molybdenum
