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N-Type silicon

by ElmorshedyDr
Tags: ntype, silicon
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ElmorshedyDr
#1
Jul18-14, 10:22 AM
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Why when phosphorus is added to silicon, phosphorus bind with only four silicon atoms and contributes with its extra electron, why doesn't just phosphorus bind with 5 silicon atoms since that is what it needs ???
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mfb
#2
Jul18-14, 12:58 PM
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Look at the lattice structure of silicon: where would the 5th silicon atom be? Is there space for a 5th and how would that atom bond to other atoms?
ElmorshedyDr
#3
Jul18-14, 01:23 PM
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Quote Quote by mfb View Post
Look at the lattice structure of silicon: where would the 5th silicon atom be? Is there space for a 5th and how would that atom bond to other atoms?

That was I thought but I wasn't sure, thanks by the way

ElmorshedyDr
#4
Jul18-14, 01:26 PM
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N-Type silicon

One more question, Are the covalent bonds among the silicon atoms in a lattice considered as intermolecular bonds ?
mfb
#5
Jul18-14, 01:45 PM
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There are no molecules in the lattice, I don't see why you would call bonds there "intermolecular bonds".


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