Hafnium

=Hafnium= By: Russell


 * Atomic Number: 72**


 * Protons: 72**


 * Electrons: 72**


 * Neutrons:** 106


 * Average Atomic Mass:** 178.49


 * Isotopes: Hf179, Hf154, and Hf157**


 * Discovery: Dirk Coster was using the x-ray spectroscopy method when he accidently discovered it while mixing two other pure elements.**
 * Name: It was named after the city of Copenhagen, Hafnia**


 * Uses: Is used as the metal in nuclear reactor control rods.**


 * Interesting Facts**: Hafnium and Zirconium are two of the hardest elements to separate once mixed.

media type="youtube" key="egw79BA_0PA" height="344" width="425"**
 * Video:


 * Sources**
 * Photo:[| http://images.google.com/images?gbv=2&hl=en&safe=active&sa=1&q=Hafnium+the+element&aq=f&oq=&aqi=&start=0] 
 * Video:[| http://www.youtube.com/watch?v=egw79BA_0PA]
 * //[|environmentalchemistry.com]//
 * [|Http:www.webelements.com]
 * //[|education.jlab.org//]//
 * //[|education.jlab.org//]//