Hafnium
Contributor:ÌýMatt Hafner
8bet the Display:
- Hafnium metal: 99% pure hafnium metal is smooth and slate colored
- Hafnium sign made of steel (made by Matt Hafner)
8bet the Contributor: Matt Hafner's company built the wooden frame of the periodic table box! He chose to contribute to the element Hafnium because it so closely resembles his last name.
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Symbol: Hf
Atomic Number: 72
Atomic Mass: 178.49 u
Electron Configuration: [Xe]4f145d26s2
Year Discovered: 1923
Discovered By: George Charles de Hevesy and Dirk Coster