Quality hard, with magnetic and good plasticity. Have a good corrosion resistance, are not oxidized in the air, but also resista nickel is Silver-white metal, density of 8.9 grams / cm 3. Melting point 1455 , boiling point 2730 . Valence 2 and 3. Ionization energy of 7.635 electron volts. Quality hard, with magnetic and good plasticity. Have a good corrosion resistance, are not oxidized in the ...