Question

THIS IS A 20 POINTS QUESTION! In case of silicon, when it is in pure form, it's valence shell is completed by the sharing of electrons with other Si atoms. now it is stable according to octet rule and electrons are bound in the covalent bonds. so, it can't conduct electricity. then why is it called a semi conductor?

Answer 1

qualifications of semiconductor is based on a single atom. and single atom is a semiconductor

Answer 2

Silicon atoms have four electrons which can be shared in covalent bonds with neighboring atoms. Silicon is the principal component of common sand, and for this reason it is less expensive than other intrinsic semiconductor