1. Molybdenum By: Allan Faldet

2. Molybdenum History: From the ancient Greek word “lead” First discovered in 1778 by Carl Wilhelm Scheele Not actually isolated until 1781 by Peter Jacob Hjelm.

3. Characteristics Very high melting temperature (6 th highest). Very high melting temperature (6 th highest). Burns at temps above 600 degrees Celsius. Burns at temps above 600 degrees Celsius. Essential element for the survival of plants and animals. Essential element for the survival of plants and animals. Greatly increases strength of steel at high temps Greatly increases strength of steel at high temps

4. Applications Used in high strength steel alloys Used in high strength steel alloys Aircraft parts, missiles Aircraft parts, missiles Catalyst in petroleum refining Catalyst in petroleum refining Important element in plant nutrition Important element in plant nutrition Electrical applications Electrical applications Furnace parts Furnace parts Many applications dealing with high heat. Many applications dealing with high heat.

5. Applications

6. Disadvantages Dust produced from mining can be toxic. Dust produced from mining can be toxic. Repeated exposure can cause skin and eye irritation. Repeated exposure can cause skin and eye irritation.

7. References http://www.corrosionsource.com/handbook/periodic/42.htm http://www.corrosionsource.com/handbook/periodic/42.htm http://www.corrosionsource.com/handbook/periodic/42.htm http://en.wikipedia.org/wiki/Molybdenum http://en.wikipedia.org/wiki/Molybdenum http://en.wikipedia.org/wiki/Molybdenum http://en.wikipedia.org/wiki/Molybdenum http://en.wikipedia.org/wiki/Molybdenum http://en.wikipedia.org/wiki/Molybdenum http://minerals.usgs.gov/minerals/pubs/commodity/molybdenum/ http://minerals.usgs.gov/minerals/pubs/commodity/molybdenum/ http://minerals.usgs.gov/minerals/pubs/commodity/molybdenum/