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.
Chaitra said:
1 decade ago
When many atoms are combined, i.e in a silicon crystal, each atom of Si is surrounded by many other atoms.
Thus each atom will take 4 electrons from neighboring atoms, and share. So in all, even though a single atom has 4e, BT when atom is made to exist in crystal, it has 8 electrons.
Thus each atom will take 4 electrons from neighboring atoms, and share. So in all, even though a single atom has 4e, BT when atom is made to exist in crystal, it has 8 electrons.
Ankit said:
1 decade ago
Single Si atom in a crystal contains 4 valence electrons.
So, answer is 4.
So, answer is 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.
Anshu said:
1 decade ago
Every si atom has 4 valence electrons but, Here we are talking about 'crystal' which is a crystalline structure of si atom in which si makes bonding with their neighbouring atoms and shares their valence electrons.
So, 4(own valenc e) + 4(shared e) = 8.
So, 4(own valenc e) + 4(shared e) = 8.
Raju anand said:
1 decade ago
Silicon atom have tetravalent atom and its belong to p block so it form four covalent bond and contain eight electron in outermost orbit so that they achieve inert gas structure.
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.
Selvarani said:
1 decade ago
Number of valance electrons in Si is 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.
Krishnakumar said:
1 decade ago
Regular arrangement of atom to form a systematic structure is called crystal. Here they are menstioned as si crystal. so it should be stable. for stable atom the outermost orbit contains 2 or 8 or 8 or 16 or 32... here atomic no. of si is 14. so it has three orbits (2,8,4). it should be stable so it become 2,8,8. hence the valence electron of si crystal is 8
Shijubaby said:
1 decade ago
I agree with dharmendra kumar.
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