Question

classification of substances
1-conductor
2-insulator
3-semiconductor
explain 3 question​

Answer 1

Answer:

conductor means object that allows the heat or electric City to pass through them

insulator means not allowed to pass electric City or heat through them

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Answer 2

Answer :

★ Conductor : Having conductivity range, 10⁴ to 10⁷ ℧/m.

• Metallic conductors conduct electricity through movement of electrons.
• Atomic orbitals of metal atoms form molecular orbitals which are very close in energy and form a band.
• In metals, there is a partial overlapping b/w filled valence band and empty conduction band thus, electron can flow easily under an applied electric field and the metal shows conductivity

★ Insulator : Having very low conductivities ranging between 10⁻²⁰ to 10⁻¹⁰ ℧/m.

• In insulators, the gap between filled valence band and the conduction band is large, electrons can't jump to it and such a substance has very small conductivity.

★ Semiconductor : Having conductivities in the intermediate range from 10⁻⁶ to 10⁴ ℧/m.

• In case of semiconductors, the gap between the valence band and conduction band is small, some electrons may jump to conduction band and show some conductivity$.$