Conductors (Cu, Al, Ni etc)

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COPPER (Cu-Atomic no.29)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
• Highly sensitive to impurities.
• Malleable and ductile with very               high thermal and electrical conductivity.
• Resistivity =1.72 x 10 to the pwr -8 Ω·m
• Electrical Conductivity =59.6 x 10^6 s/m
• Specific gravity  8.9
• Melting point 1084° C
• Magnetic ordering : diamagnetic
• The maximum permissible current density of copper in open air is app. 3.1 x 10^6 A/sq.m of cross sectional area, above which it begins to heat excessively.

Aluminium(Al, third most abundant element after oxygen and silicon, atm. no. 13)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
• Resistivity 2.6 x 10^-8 Ω·m
• Melting point 658°C
• Specific Gravity 2.7
• Cheif ore Bauxite
• Magnetic Ordering - Paramagnetic
• Low density and its ability to resist corrosion through the phenomenon of passivation, It is remarkable for those two reasons. • A thin surface layer of Aluminium oxide forms when it is exposed to air, prevention further oxidation.
• Soft, Durable, Light Weight, Ductile, and Malleable.

Brass(Cu-60 Zn 40)
^^^^^^^^^^^^^^^^^^^^^^^
• High tensile strength, lower conductivity, ductile, high resistance to corrosion.
• Relatively low melting point 900 to 940°C
• Specific gravity 3.3
• Resistivity 7.5 x 10^-8 Ω·m
• Melting Point 840°C

Bronze(Cu88%+tin12%)
^^^^^^^^^^^^^^^^^^^^^^^^^^
• Hard and brittle
• Corrosion Resistance is better than Brass.
• Alpha bronze alloys of 4-5% tin,  are used to make turbines, blades etc
• Plastic bronze _ bronze with #lead content which makes far improved plasticity.

Mercury( Hg, atm no 80)
^^^^^^^^^^^^^^^^^^^^^^^^^^^
• Expands and contracts in Regular degree.
• Resistivity 95.8 x 10^-8 Ω·m
• Oxidation takes place at tempt. more than 300° C
• Melting Point =  -38°C
• Specific gravity: 13.5
• Magnetic ordering diamagnetic.

Silver(Ag, Atm no. 47)
^^^^^^^^^^^^^^^^^^^^^^^^
• Not affected to weather change.
• Used for HRC fuse element, radio frequency conducting bodies
• Resistivity 1.65x 10^-8 Ω·m
• Melting Point 961°C
• Magnetic Ordering diamagnetic.

Zinc(Zn, atm no 30)
^^^^^^^^^^^^^^^^^^^^^^^
• Resistivity 59.0 nΩ·m(at 20°C)
• Magnetic Ordering diamagnetic

Nickel(Ni, atm no 28)
^^^^^^^^^^^^^^^^^^^^^^^
• Hard and brittle
• Melting point 1455°C
• Electrical Resistivity 69.3 nΩ·m(at 20°C)
• Magnetic Ordering Ferromagnetic

Tin(Sn, atm no 50)
^^^^^^^^^^^^^^^^^^^^^
• Melting point 231°C
• Electrical resistivity 115 nΩ·m at 0°C
•• Magnetic ordering -
               • gray : diamagnetic
               • white : Paramagnetic

Molybodenum(Mo, atm no 42)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
• Melting point 2623°C
• Specific gravity 10.28
• Electrical Resistivity 53.4 nΩ·m(at 20°C)
• Magnetic ordering :  Paramagnetic