INTRODUCTION
• Transition Metal is one which forms one
or more stable ions which have
incompletely filled d orbital
• We will go further on the physical
properties of the metal, their
magnetisms, electron configuration and
the chemical reactions that are involved
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PROBLEM BASED LEARNING
THE MAIN REASON
• Exposure of copper to environment will causes oxidation and production of
green salts.
•Exposure to hot and humid environment
• Person which has high acidity level in his/her skin
• We release chemicals from our bodies in the forms of sweat
• These materials are acidic in nature
• They cause metals to corrode, or turn, at least on the surface of the metal, to a salt compound of the metal
• The green from the ring is caused by oxidation
• The silver will oxidize, so, it give a tarnished looked
• The green layer on the copper is called patina
• This patina protect the copper from further corrosion
• The patina forms when airborne sulfur compounds react with the copper
• It always form in damp air
• The major of patina is Copper (II) sulfate (CuSO4) and has a green color
Wednesday, February 18, 2009
Posted by grOup 7 at 4:02 AM
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