Copper; copper coin

virgin aluminum

virgin aluminum

zinc (Zn)

Zinc (symbol: Zn)

tin

Tin symbol Sn Tin: A silver ductile metallic element, mainly obtained from cassiterite. It is used to wrap other metals to prevent corrosion, and it is also a part of various alloys, such as soft solder, Bai La, lead alloy and bronze. Atomic number 50; The atomic weight is118.69; Melting point 231.89 = c; Boiling point 2270 = c；; Specific gravity 7.31; Valence 2,4

nickel

Nickel, symbol Ni Ni: A silvery, hard and malleable metallic element used in alloys, corrosion-resistant surfaces and batteries, and electroplating. Atomic number 28; Atomic weight 58.71; Melting point1.453 = c; Boiling point 2732 = c；; Specific gravity 8.902; The valence is 0. 1.2,

lead to

Lead, symbol Pb Lead: A soft, malleable, blue-white, high-density metal element, mainly extracted from galena, used in containers, corrosion-resistant pipelines, solder and lead, bullets, radioactive shielding, paints and explosion-proof compounds. Atomic number 82; Atomic weight 207.19; Melting point 327.5 = c；; Boiling point 1, 744 = c；; Specific gravity11.35; Valence 2 or 4

aluminium alloy

aluminium alloy