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MOLÜBDEEN
Konstantin Merkulov ja Kristjan Talvoja.
MIS SEE ON JA KUST SEDA LEIDUB ?
•   Molübdeen on hallikasvalge, rasksulav ja toatemperatuuril keemiliselt püsiv
    metall.Omadustelt metall järjenumbriga 42, aatommassiga 95,94.
•   Looduses täiesti puhast molübdeeni ei leidu, küll aga ühenditena. Mo peamiseks
    ühendiks on molübdeniit ehk molüdeenläik MoS2. Vaba molübdeeni saadakse maagi
    särdamisel, mille tagajärjel tekib molübdeentrioksiid MoO3.See omakorda
    redutseeritakse vesinikuga ning saadakse pulbriline molübdeen. Et seda
    kompakseks muuta, pressitakse seda kõrgel temperatuuril.
Molübdeeni Eripära.
Ta juhib hästi elektrit. Tema heaks
omaduseks on väike soojuspaisumistegur,
tänu millele saab teda paljudes seadmetes
kasutada. Venitatav ja sepistatav on ta vaid
kõrgel temperatuuril.
Tal on 7 stabiilset isotoopi massiarvudega
92, 94, 95, 96, 97, 98 ja 100.
Tema sulamistemperatuur on 2623 Celsiuse
Kraadi.
KASUTAMISVIISID
•   Veerand toodetud molübdeenist läheb
    roostevaba terase tootmiseks, teine
    veerand määrdeainete tootmiseks ja
    50% e pool läheb muuks
    otstarbeks, peamiselt rauasulamite
    tootmiseks.
•   Valmistatakse püssi- ja
    suurtükkitorusid,soomusplaate,tehaks
    e ka lennukite reaktiivmootorid ja
    turbiinid
•   Molübdeeni on vaja ka inimestel.
    Peamised molübdeeni sisaldavad
    toiduained on loomakiha, lehma- ja
    kitsepiim, austrid, kaunviljad, teravilja
    d, täisteraviljatooted, kookospähklid,
    melonid, kakaopulber ja
    tumerohelised aedviljad
BIOTOIME
•   Makroelementide sisaldus kehas on üle 0,01% molübdeeni ainet.
•   Molübdeeni on vaja luukoe tekkeks ja arenguks, vereloomeprotsessideks, mitmete
    väävliühendite ainevahetuse korrastamiseks, kehavõõraid ühendeid kahjutuks
    muutvate süsteemide toimimiseks. Kui aga organismis on liiga palju
    molübdeeni, soodustab see podagra teket.
•   Mida rohkem molübdeeniühendeid on pinnases, seda molübdeenirikkamad on
    toiduained, seda suurem on vere kusihappesisaldus, seda rohkem podagrat ja
    geniaalseid mõtteid... .
KES JA KUIDAS AVASTATI MOLÜBDEENI?
•   Molübdeeni ainet avastas Carl
    Wilhelm Scheele,kes oli rootsi
    keemik ja apteeker.
•   Molübdeeni ta avastas 1778 aastal
    kui tegi kindlaks, et õhk on kahe
    komponendi segu, kuid ei suutnud
    koostist määrata.Hiljemalt ta
    valmistas üle kümne happesi
    millega siis kaasnes iga elemendi
    avastamisega rida keerulisi
    laboratoorseid katseid ja igast ei
    jõua me rääkida,nende hulgast oligi
    Molübdeen.
•   Tänapäeval molübdeeni hind ulatub
    30.000 tuhande euroni tonni kohta.
KASUTATUD KIRJANDUS
•   http://www.annaabi.ee/Mol%C3%BCbdeeni+referaat-m28450.html
•   http://www.annaabi.com/Halogeenide-referaat-mx65103.html
•   http://www.toitumine.ee/mulobdeen/
•   http://en.wikipedia.org/wiki/Molybdenum

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Molübdeeni esitlus

  • 2. MIS SEE ON JA KUST SEDA LEIDUB ? • Molübdeen on hallikasvalge, rasksulav ja toatemperatuuril keemiliselt püsiv metall.Omadustelt metall järjenumbriga 42, aatommassiga 95,94. • Looduses täiesti puhast molübdeeni ei leidu, küll aga ühenditena. Mo peamiseks ühendiks on molübdeniit ehk molüdeenläik MoS2. Vaba molübdeeni saadakse maagi särdamisel, mille tagajärjel tekib molübdeentrioksiid MoO3.See omakorda redutseeritakse vesinikuga ning saadakse pulbriline molübdeen. Et seda kompakseks muuta, pressitakse seda kõrgel temperatuuril.
  • 3. Molübdeeni Eripära. Ta juhib hästi elektrit. Tema heaks omaduseks on väike soojuspaisumistegur, tänu millele saab teda paljudes seadmetes kasutada. Venitatav ja sepistatav on ta vaid kõrgel temperatuuril. Tal on 7 stabiilset isotoopi massiarvudega 92, 94, 95, 96, 97, 98 ja 100. Tema sulamistemperatuur on 2623 Celsiuse Kraadi.
  • 4. KASUTAMISVIISID • Veerand toodetud molübdeenist läheb roostevaba terase tootmiseks, teine veerand määrdeainete tootmiseks ja 50% e pool läheb muuks otstarbeks, peamiselt rauasulamite tootmiseks. • Valmistatakse püssi- ja suurtükkitorusid,soomusplaate,tehaks e ka lennukite reaktiivmootorid ja turbiinid • Molübdeeni on vaja ka inimestel. Peamised molübdeeni sisaldavad toiduained on loomakiha, lehma- ja kitsepiim, austrid, kaunviljad, teravilja d, täisteraviljatooted, kookospähklid, melonid, kakaopulber ja tumerohelised aedviljad
  • 5. BIOTOIME • Makroelementide sisaldus kehas on üle 0,01% molübdeeni ainet. • Molübdeeni on vaja luukoe tekkeks ja arenguks, vereloomeprotsessideks, mitmete väävliühendite ainevahetuse korrastamiseks, kehavõõraid ühendeid kahjutuks muutvate süsteemide toimimiseks. Kui aga organismis on liiga palju molübdeeni, soodustab see podagra teket. • Mida rohkem molübdeeniühendeid on pinnases, seda molübdeenirikkamad on toiduained, seda suurem on vere kusihappesisaldus, seda rohkem podagrat ja geniaalseid mõtteid... .
  • 6. KES JA KUIDAS AVASTATI MOLÜBDEENI? • Molübdeeni ainet avastas Carl Wilhelm Scheele,kes oli rootsi keemik ja apteeker. • Molübdeeni ta avastas 1778 aastal kui tegi kindlaks, et õhk on kahe komponendi segu, kuid ei suutnud koostist määrata.Hiljemalt ta valmistas üle kümne happesi millega siis kaasnes iga elemendi avastamisega rida keerulisi laboratoorseid katseid ja igast ei jõua me rääkida,nende hulgast oligi Molübdeen. • Tänapäeval molübdeeni hind ulatub 30.000 tuhande euroni tonni kohta.
  • 7. KASUTATUD KIRJANDUS • http://www.annaabi.ee/Mol%C3%BCbdeeni+referaat-m28450.html • http://www.annaabi.com/Halogeenide-referaat-mx65103.html • http://www.toitumine.ee/mulobdeen/ • http://en.wikipedia.org/wiki/Molybdenum