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https://www.hobart.k12.in.us/ksms/PeriodicTable/hafnium.htm

https://education.jlab.org/itselemental/ele072.html

https://en.wikipedia.org/wiki/Hafnium

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Halfiums mainly used for rods in ships.But is also known for being used for the flash in photos, spaceship engines, used in military tanks, and vacuum tubes.

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Melting Point- 2233c
Boiling Point-4603c
Density-13.07g
Abundance in Earths Crust-.00033%

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Hafnium - Video Learning - WizScience.com

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"Hafnium" is a chemical element with symbol "Hf" and atomic number 72. A lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in zirconium minerals. Its existence was predicted by Dmitri Mendeleev in 1869, though hafnium was not identified until 1923, making it the penultimate stable isotope element to be discovered .

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Halfium was first found in 1923 in Copenhagen, Denmark. It was discovered by two chemists named Dirk Coster and Charles de Hevesy.

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-Halfniums element name is Hf
-the atomic number is 72
-the atomic mass is 178.49
-Halfium is found on Earth crust combined in solid solution
-Haliums element class is metals
-Halfium is in Group 4 which is known as the transition metals
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