Electronics - Voltage and Current - Discussion
Discussion Forum : Voltage and Current - General Questions (Q.No. 24)
24.
How many valence shell electrons are there in semiconductor atoms?
Discussion:
33 comments Page 1 of 4.
Kunal said:
1 decade ago
A semiconductor has a gap of 1 electron volt because of this valance band and conduction band can not overlap each each other. Thus flow of current is only possible when it get heated then valance band and conductor band overlap each other for example silicon and germanium which is used in making special type of semiconductor or you can say industrial devices like fet ujt zener diode triac diac devices.
Deepika said:
1 decade ago
@ nitin
When no of valence electron in an atom is less than 4 , the material is usually a metal and a conductor. ex:sodium, magnesium, alluminium which have 1, 2 , 3 valence electron respectively.
When no of valence electron in an atom is more than 4 , the material is usually a non metal and a insulator.Ex:nitrogen, sulphur, neon which have 5, 6 ,8 valence electron respectively.
When no of valence electron in an atom is less than 4 , the material is usually a metal and a conductor. ex:sodium, magnesium, alluminium which have 1, 2 , 3 valence electron respectively.
When no of valence electron in an atom is more than 4 , the material is usually a non metal and a insulator.Ex:nitrogen, sulphur, neon which have 5, 6 ,8 valence electron respectively.
Nidhya said:
1 decade ago
More the no. of valence electrons then more the strength of bond will be. Thats why noble gases(with 8 valence e they are inert to react).
We classify substances which ve
1,2,3 valance e - conductors
exactly 4 valance e - semi conductors
5,6,7 valance e - insulators
8 valance e - noble gases
We classify substances which ve
1,2,3 valance e - conductors
exactly 4 valance e - semi conductors
5,6,7 valance e - insulators
8 valance e - noble gases
Harsha Vardhan said:
1 decade ago
Semi conductors are the devices whose conductivity lies in between the insulators and pure conductors. In general some elements from 3A (BORAN) , 4A (Si, Ge) , 5A (As, Sb) 6A (Te, Po) are the semiconductor metals having unfilled valency electrons.
Aastha said:
1 decade ago
When the no.of valence electron is less than 4 then that will be a metal ion and when the no.of valence electron is more than 4 then it is a nonmetal.
But if the no.of valence electron is exactly 4 then it is a semiconductor.
But if the no.of valence electron is exactly 4 then it is a semiconductor.
(6)
Dinesh Kumar gadde said:
8 years ago
The outermost orbit of an atom is called as valence shell.
The number of valence electrons present in a valence shell is based on its capacity.
For example: take silicon a semiconductor, which has 4 valance electrons.
The number of valence electrons present in a valence shell is based on its capacity.
For example: take silicon a semiconductor, which has 4 valance electrons.
(1)
Paramesh said:
1 decade ago
The resistance of semiconductor lies between conductors and insulators and it is a negative temperature coefficient material i.e. when temperature increases the resistivity of the material decreases.
Manish bagga said:
1 decade ago
Yes it is true that semiconductor have 4 electrons in outer most shell and conductor have less than 4 electron in the outer most shell and insulater have 8 electron in outer most shell.
Abilash said:
1 decade ago
Atomic number of silicon=14
Atomic number of Germanium=32
Electonic Structure of si=2,8,4
Electonic Structure of Ge=2,8,18,4
so valence electron of semi conductors are 4(four)
Atomic number of Germanium=32
Electonic Structure of si=2,8,4
Electonic Structure of Ge=2,8,18,4
so valence electron of semi conductors are 4(four)
Manju said:
1 decade ago
1,2,3 valance is - conductor.
4 is - semiconductor.
5,6,7 is - insulator.
8 valance is - noble gas .
So valence electrons are in semiconductor is 4.
4 is - semiconductor.
5,6,7 is - insulator.
8 valance is - noble gas .
So valence electrons are in semiconductor is 4.
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