a-tin, an allotrope of tin that exists below 132 , is a semiconductor, while -ti

Question

a-tin, an allotrope of tin that exists below 132 , is a semiconductor, while -tin exists at higher temperatures and is a conductor. As the temperature increases from temperature below 13.2 °C to higher than 13.2 °C energy difference between antibonding orbitals and bonding orbitals increases. energy difference between antibonding orbitals and bonding orbitals decreases. energy difference between the valence band and conduction band increases. energy difference between the valence band and conduction band decreases.

Explanation / Answer

above 13.20c semiconductor alpha tin become conductor beta tin. conductor has a very small gap between valence and coduction band.Thus,

Energy difference between valence band and conduction band decreases

which is the prime requirment for a conductor.

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