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Chemical Elements.com - Hafnium (Hf)
“Basic Information Name: Hafnium Symbol: Hf Atomic Number: 72 Atomic Mass: 178.49 amu Melting Point: 2150.0 °C (2423.15 K, 3902.0 °F) Boiling Point: 5400.0 °C (5673.15 K, 9752.0 °F) Number of Protons/Electrons: 72 Number of Neutrons: 106 Classification: Transition Metal Crystal Structure: Hexagonal...” (from the page’s text)
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