Electronic Devices - Semiconductors - Discussion
Discussion Forum : Semiconductors - General Questions (Q.No. 12)
12.
Effectively, how many valence electrons are there in each atom within a silicon crystal?
Discussion:
32 comments Page 2 of 4.
Karthik said:
1 decade ago
In question they have asked how many valence electrons in each atom in crystal. They are not asking in crystal. Ther are asking in each atom in crystal. So answer is 4.
Jitendra said:
9 years ago
In question ask si crystal, not si atom so one si crystal surrounding by 4 si atom hence in si crystal 4 valence electrons & 4 covalent electrons finally 8e.
(1)
Raj singhania said:
1 decade ago
The answer is 4 why because the atomic no of Si is 14 and the orbital states will be 2, 8, 4. So the valence electron must be 4 and not 8.
Sanjeetkumarjha said:
1 decade ago
14-1s2, 2s2, 2p6, 3s2, 3p2 this is the right electronic configuration. So, total electron i last orbital that means in p-orbital=6+2=8.
Mayank said:
10 years ago
Valance electron are electron that able to make covalent bond and that are in outer most shell. So it must be 4.
Haribabu said:
1 decade ago
He is giving si crystal it will stable after forming the 4 covalent bonds in each have two electrons by sharing.
Ashraf said:
1 decade ago
The question asked is for crystal but not for an atom. So, Si crystal has 8 valence electrons I agree with 8.
Miss jyoti said:
1 decade ago
The remaining 4 atom, which is present in last cell are making bond with 4 another atom. that is 4+4= 8.
Dhyan said:
9 years ago
The silicon (si) atom and silicon (si) crystal have a different configuration of electrons.
Rajalingam said:
1 decade ago
But the question asked is for an atom. Its not mentioned about the neighbouring atoms!
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers