An intrinsic pure silicon crystal at room temperature has...

An intrinsic (pure) silicon crystal at room temperature has sufficient heat (thermal) energy for some valence electrons to jump the gap from the valence band into the conduction band, becoming free electrons. Question 8 options: TrueFalse

Transcript

00:01 Hello students, so the answer of the tenth part, it is said that according to the band theory of metal, band theory of metal, the electrical conductivity of the metal are so high.

00:15 Electrical conductivity, conductivity of metal is so high.

00:28 And because of the free valence electron, because of free valence electron being present in the system.

00:42 And due to this particular feature, they can form infinitely extended layer of one dimensional.

00:48 They form extended layer, extended layer of one dimensional and delocalized molecule and delocalized molecule and delocalized.

01:04 Molecule okay and the molecular orbital and also due to their particular property the band gap between the conduction and valence bond will be decreases so band gap between conduction and balance electron it will be decreased okay so is a part 10 then again so that's why so actually it is a free electron which help the metal system to be very good electrical conductor so it is a free electron free electron that help to good electrical conductor electrical conductor okay so that's why monovalent a g mono it is a monovolent ag metal is much better electrical conductor than that of the tetravalent silicon okay so compared to with the tetravalent electron monovolent silver is a much better electrical conductor because option a that is a its electron are more fabile it's its electron are more mobile it means they are free okay and the 11th is 11th is for electron like silicon like silicon and diamond the electrical conductivity is obviously depend on the they depend on the band gap band gap and operating temperature as these are two tuning parameters which are also interdependent it's slowly responsible for the increase or decrease in the electrical conductivity of the system...

Question

An intrinsic (pure) silicon crystal at room temperature has sufficient heat (thermal) energy for some valence electrons to jump the gap from the valence band into the conduction band, becoming free electrons. Question 8 options: TrueFalse

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