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Hafnium
2005-05-26 10:45:58

Hafnium is a chemical element in the periodic table that has the symbol Hf and atomic number 72. A lustrous, silvery gray tetravalent transition metal, hafnium resembles zirconium chemically and is found in zirconium minerals. Hafnium is used in tungsten alloys in filaments and electrodes and also acts as a neutron absorber in nuclear control rods. Notable characteristics This is a shiny...

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donative
  • A gift; a largess; a gratuity; a present; a dole.
The word 'donative' comes from a Latin word meaning 'to give'.
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