Asked in UHS MDCAT 2024 2024Moderate

In graphite the carbon atoms are arranged in which of the following structure?

Correct answer: B. Hexagonal

  • A. Rhombic
  • B. Hexagonal
  • C. Tetragonal
  • D. Trigonal

Explanation

Graphite is hexagonal because its carbon atoms form hexagonal rings in flat layers, with each atom sp² hybridized and bonded to three neighbors in a trigonal planar arrangement. The layers stack in an ABAB pattern, characteristic of the hexagonal crystal system.

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About Crystalline Solids

Crystalline solids contain particles arranged in a regular repeating lattice described by a unit cell. Their study includes coordination number, packing efficiency, density, anisotropy, cleavage, polymorphism and common crystal systems, along with ionic, molecular, covalent network and metallic crystals. Crystalline order differs from the random arrangement of amorphous solids.

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