Wednesday, February 18, 2009





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










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