Semi-conductor materials have:
Correct answer: B. Covalent bond
- A. Ionic bond
- B. Covalent bond
- C. Mutual bond
- D. Metallic bond
Explanation
A covalent bond is a chemical bond that involves the sharing of electrons to form electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs. The stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding. Semiconductor materials have covalent bonding between atoms (FACT). They are only able to conduct electricity due to delocalized electrons.
This question appeared on the ETEA MDCAT 2015 paper, which you can sit online with every answer explained.
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About Electrical Properties of Solids
Electrical properties of solids depend on their band structure, charge carriers and conductivity. The topic compares conductors, insulators and semiconductors, relates resistivity to temperature, and covers intrinsic and extrinsic semiconductors, donor and acceptor impurities, electron and hole conduction, and the formation of p-type and n-type materials.
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