Thecrystals which are good conductors of electricity and heat are

1.	Thecrystals which are good conductors of electricity and heat are
Answer» Solution :(i) The bonding in METAL is explained by molecular ORBITAL theory. As per this theory, the atomic ORBITALS of large number of atoms in a crystal overlap to form numerous bonding and anti-bonding molecular orbitals without any band GAP. (ii) The bonding molecular orbitals are completely filled with an ELECTRON pair in each, and the anti-bonding molecular orbitals are empty. (iii) Absence of band gap accounts for high clectrical conductivity of metals.

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