Molybdenum

Molybdenum is a Group 6 chemical element with the symbol Mo and atomic number 42. The name is from Neo-Latin Molybdaenum, from Ancient Greek Μόλυβδοςmolybdos, meaning lead, since its ores were confused with lead ores. Molybdenum minerals have been known into prehistory, but the element was discovered (in the sense of differentiating it as a new entity from the mineral salts of other metals) in 1778 by Carl Wilhelm Scheele. The metal was first isolated in 1781 by Peter Jacob Hjelm.
Molybdenum does not occur naturally as a free metal on Earth, but rather in various oxidation states in minerals. The free element, which is a silvery metal with a gray cast, has the sixth-highest melting point of any element. It readily forms hard, stable carbides in alloys, and for this reason most of world production of the element (about 80%) is in making many types of steel alloys, including high strength alloys and superalloys.
Most molybdenum compounds have low solubility in water, but the molybdate ion MoO42− is soluble and forms when molybdenum-containing minerals are in contact with oxygen and water. Industrially, molybdenum compounds (about 14% of world production of the element) are used in high-pressure and high-temperature applications, as pigments and catalysts.
Molybdenum-containing enzymes are by far the most common catalysts used by some bacteria to break the chemical bond in atmospheric molecular nitrogen, allowing biological nitrogen fixation. At least 50 molybdenum-containing enzymes are now known in bacteria and animals, although only bacterial and cyanobacterial enzymes are involved in nitrogen fixation, and these nitrogenases contain molybdenum in a different form from the rest. Owing to the diverse functions of the various other types of molybdenum enzymes, molybdenum is a required element for life in all higher organisms (eukaryotes), though not in all bacteria.

This entry was posted in

    Category List

    • 3D Animation Video
    • 3D presentation
    • 3G
    • 3G Data Cards
    • 5 Essential Diet Tips
    • A Way to Earn $100 A Day..Capitalize on FaceBook
    • Accessories
    • Adsense
    • Amazon
    • Android
    • Apple
    • Approval
    • Article
    • basic I.T
    • best ways of burning fat
    • Bike
    • biomedical
    • Biomedical Engineering
    • BlackBerry
    • Blogs
    • Bodybuilder
    • Bodybuilder Diet
    • Bodybuilder's Diet
    • Books
    • brain
    • Brain Cancer
    • brain structure
    • Brain Tumor
    • Brain wired for learning
    • Breakfast Diet
    • Bucknell Engineering Week
    • Bucknell Engineering Week-2013
    • Burning Fat
    • Camera
    • Cancer
    • caner treatment
    • Cars
    • central nervous system
    • common diseases
    • Computer
    • Cricket News
    • CSK News
    • Dengue Virus
    • Dengue Virus Infection
    • Devices
    • Diabetes
    • Diabetes overview
    • Diabetes patients
    • Diet
    • Diet for Bodybuilder
    • DNA
    • DNA Replication
    • Energy
    • Essential Diet Tips
    • facebook
    • Facebook Timeline
    • Filter Blood
    • four fundamntal human tissue
    • Games
    • gift cards
    • ginger
    • Google
    • hacking
    • Health benifit
    • Healthy Breakfast
    • Healthy Breakfast Routine
    • Heart
    • Heart Failure
    • Heart Failure Video
    • Hiv
    • HIV replication
    • Host web site server
    • How to create a Google AdSense account
    • How to Earn Money on YouTube
    • How To Earn Money Online From PTC Sites ?
    • How to Get Visitors (Traffic) to Your Blog from Go...
    • How to Insert Heading Tags to Blogger Blog Posts
    • How To Make Money From Facebook?
    • How to Make Money From Google : Proven Strategy
    • How To Make Money Online on YouTube
    • How To Make Money Online With Google AdSense?
    • How to Use Post Title As Title Tag in Blogger Blog
    • human body
    • Human nervous system
    • human tissue
    • If you already have a Google AdSense account
    • iMotion
    • Indian News
    • Information
    • INTERNET
    • iPad
    • IPL News
    • Jobs
    • Kidney
    • Laptop
    • Laptops
    • LG
    • LG Nexus
    • Make money
    • Make Money Online in India : An Adsense Gameplan
    • Make Money Online in India The Hard Way
    • Make Money Online Strategy in 2013 & Beyond
    • Make more money with Google Adsense – Simple trick...
    • Making Money Online From Home Possible?
    • medical debate
    • medical science
    • Medical video
    • medicalvideo
    • medicinevideo
    • Memory Card
    • Micromax
    • Microsoft Office Access 2007
    • Microsoft Office Excel 2007
    • Microsoft Office InfoPath 2007
    • Microsoft Office Outlook 2007
    • Microsoft Office Power Point 2007
    • Microsoft Office Word 2007
    • Mobile
    • Model Diet
    • Model's Diet
    • Model's Essential Diet Tips
    • Modern Medicine
    • Muscle building Secrets
    • Nephron
    • nerve
    • nervous system
    • Nexus
    • Online Data Entry jobs in India & The Hard Reality
    • Player Diet
    • Player's Diet
    • Ptc
    • Reabsorb water
    • Reviews
    • Samsung's
    • Secret Nutrition Tips for Player
    • Security
    • Self-test
    • SEO Tips For Blogger Blogspot Blogs
    • Smartphones
    • Software
    • Solar Energy
    • Sports Nutration
    • Super Food
    • Symptoms of Brain Tumor
    • Tablet
    • Tablets
    • Technology
    • thyroid
    • thyroid diseases
    • Thyroid Test
    • Tips And Trick
    • Tools
    • Traditional Medicine
    • Traditional vs Modern Medicine
    • treatment
    • Tutorials
    • USB
    • Vehicle
    • vlc
    • Ways of cancer treatment
    • Web Development
    • webdesign
    • What is cancer
    • What it Takes to Earn Money Online in India
    • Wi-Fi
    • Wi-Fi Devices
    • Wi-Fi Printer
    • windows
    • windows 98
    • Windows Phone
    • Windows Vista
    • windows XP
    • ZTE

Bloggerized by FiyaGalito & | Powered By Movizac.com