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Hafnium, metal Hf, atomic number 72, atomic weight 178.49, is a shiny silver gray transition metal.
Hafnium has six naturally stable isotopes: hafnium 174, 176, 177, 178, 179, and 180. Hafnium does not react with dilute hydrochloric acid, dilute sulfuric acid, and strong alkaline solutions, but i...
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