Which o f the following theories was put forward by Drude and extended by Loren (1923) to explain the properties of metallic solid?
Correct answer: A. Electron gas theory
- A. Electron gas theory
- B. Valance bond theory
- C. Band theory
- D. Crystal field theory
Explanation
Option A is correct. Electron gas theory was put forward by Drude and extended by Loren (1923) to explain the properties of metallic solid. The electron gas theory assumes that the valence electrons of a metal are free to move throughout the metal, like a gas. This explains the high electrical conductivity of metals. The theory also explains the high thermal conductivity of metals, as the free electrons can carry heat energy throughout the meta.
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Chemical bonding explains molecular shape through VSEPR theory and distinguishes sigma bonds from pi bonds. Questions involve hybridization, bond angles, dipole moment and bond energy, including how electron-pair repulsion determines geometry and how bond polarity differs from the overall polarity of a molecule.
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