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Graphite is a non-metal then also it shows good conductivity of electricity ...
EXPERT PLEASE EXPLAIN WHY IT IS SO.....

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     Graphite is a non metal but it shows good conductivity of electricity because of the free electrons present due to pi bond and these electrons can easily move from one point to another. It is an allotrope of carbon but in this compound the carbon atoms are present in layers in a hexagonal structure and the presence of movable pi electrons makes it conductive.  
 
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This is a very good question, and in fact it depends on your definition of ‘metal’. Metals are characterised by delocalised bonding - that is, they have valence electrons that can move from one atom to the next, and so on through the whole crystal structure. Carbon usually forms strong, covalent bonds with itself and so is normally thought of as a non-metallic element.

However, graphite has a delocalised bonding network in plane with weak  interactions between planes. In more straightforward language, electrons are free to travel from one atom to the next throughout each layer, but they’re unable to move between layers. It can be thought of as metallic in plane, but not between planes.                                               hope it helps

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Electrical resistivity (also known as resistivity, specific electrical resistance, or volume resistivity) is an intrinsic property that quantifies how strongly a given material opposes the flow of electric current. A low resistivity indicates a material that readily allows the flow of electric current. Resistivity is commonly represented by the Greek letter ρ (rho). The SI unit of electrical resistivity is the ohm-metre (Ω⋅m).[1][2][3] As an example, if a 1 m × 1 m × 1 m solid cube of material has sheet contacts on two opposite faces, and the resistance between these contacts is 1 Ω, then the resistivity of the material is 1 Ω⋅m.

Electrical conductivity or specific conductance is the reciprocal of electrical resistivity, and measures a material's ability to conduct an electric current. It is commonly represented by the Greek letter σ (sigma), but κ (kappa) (especially in electrical engineering) or γ (gamma) are also occasionally used. Its SI unit is siemens per metre (S/m) and CGSE unit is reciprocal second (s−1).

 

Contents   [hide] 
  • 1Definition
    • 1.1Resistors or conductors with uniform cross-section
    • 1.2General definition
  • 2Causes of conductivity
    • 2.1Band theory simplified
    • 2.2In metals
    • 2.3In semiconductors and insulators
    • 2.4In ionic liquids/electrolytes
    • 2.5Superconductivity
    • 2.6Plasma
  • 3Resistivity and conductivity of various materials
  • 4Temperature dependence
    • 4.1Linear approximation
    • 4.2Metals
    • 4.3Semiconductors
  • 5Complex resistivity and conductivity
  • 6Tensor equations for anisotropic materials
  • 7Resistance versus resistivity in complicated geometries
  • 8Resistivity density products
  • 9See also
  • 10Notes
  • 11References
  • 12Further reading
  • 13External links
     

 

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