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Thanks Albert & Ashubrads but I want to ask is why P atom becomes positive when its octet is complete( even after losing the electron). It should be neutral ,right?
In an n-type semiconductor, the n-type impurity( say P) makes bond with the neighboring Si atoms and gives off 1 electron. Though it loses 1 electron but still its octet is complete, so why P atom considered to be a +ve ion?
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