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hafnium.asc
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1992-09-14
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409b
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14 lines
HAFNIUM
Atomic symbol - Hf
Atomic weight - 178.49
Atomic number - 72
Electron configuration - 2-8-18-32-10-2
Oxidation states - +4
State of matter - solid
Heavy metal-ductile
Discovered in 1923 by Dirk Coster and George Charles de Hevesy
Boils at 5400 °C, melts at 2150 °C
Notes:
Chemically similar to zirconium (40), hafnium is used as nuclear control rods.