hafnium /haf·ni·um/ (Hf) (haf´ne-um) chemical element, at. no. 72.
hafnium (Hf)
haf·ni·um (h f n - m)n. Symbol Hf A metallic element found with zirconium and used in nuclear reactor control rods and in tungsten alloys used in filaments. Atomic number 72. |
hafnium (Hf)
[haf′nē·əm]
Etymology: Hafnia, Medieval Latin name of Copenhagen, Denmark
a hard, brittle silver-gray metallic element of the third transition series. Its atomic number is 72; its atomic mass is 178.49. Elements in this group show some nonmetallic chemical characteristics.
hafnium
a chemical element, atomic number 72, atomic weight 178.49, symbol Hf. See Table 6.
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