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Which of the following models best describes the bonding within a layer of the graphite structure ?
  • a)
    metallic bonding
  • b)
    ionic bonding
  • c)
    non-metallic covalent bonding
  • d)
    van der Waals force
Correct answer is option 'D'. Can you explain this answer?
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Bonding within a Layer of the Graphite Structure

Introduction:
Graphite is a form of carbon that consists of layers of carbon atoms arranged in a hexagonal lattice. These layers are held together by a specific type of bonding called van der Waals forces.

Van der Waals Forces:
Van der Waals forces are weak intermolecular forces that exist between molecules or atoms. These forces arise due to temporary fluctuations in electron distribution, which result in the creation of temporary dipoles. In the case of graphite, the van der Waals forces are known as London dispersion forces.

Graphite Structure:
In the graphite structure, each carbon atom is covalently bonded to three other carbon atoms within the same layer, forming a planar hexagonal lattice. These covalent bonds are strong and give graphite its characteristic strength.

The layers themselves are held together by van der Waals forces, which are relatively weak. This allows the layers to slide over each other easily, which is why graphite is a good lubricant.

Explanation:
The best model that describes the bonding within a layer of the graphite structure is van der Waals forces. This is because the covalent bonds between the carbon atoms within each layer are strong and are responsible for the structural integrity of the lattice. However, the bonding between the layers is weak and can be easily overcome, allowing the layers to slide past each other.

Comparison with Other Options:
a) Metallic Bonding: Metallic bonding involves the delocalization of electrons throughout a metal lattice. This type of bonding is not present in the graphite structure, as the carbon atoms are not capable of delocalizing their electrons in the same way as metals.

b) Ionic Bonding: Ionic bonding occurs between atoms with significantly different electronegativities, resulting in the transfer of electrons from one atom to another. In the graphite structure, there is no transfer of electrons between the carbon atoms, so ionic bonding is not applicable.

c) Non-metallic Covalent Bonding: While covalent bonding does occur within each layer of the graphite structure, it does not fully describe the bonding between the layers. Covalent bonds are strong and would prevent the layers from sliding past each other, which is not observed in graphite.

Conclusion:
In conclusion, van der Waals forces best describe the bonding within a layer of the graphite structure. The covalent bonds between carbon atoms within each layer give graphite its strength, while the weak van der Waals forces between the layers allow for easy sliding and make graphite a good lubricant.
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Which of the following models best describes the bonding within a layer of the graphite structure ?a)metallic bondingb)ionic bondingc)non-metallic covalent bondingd)van der Waals forceCorrect answer is option 'D'. Can you explain this answer?
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