Question

Why glass is bad conductor of current

Answer 1

Glass does not conduct electricity because:

Glass is mostly silicon oxide, a covalent compound[1] .

Covalent compounds share electrons from each of the constiuent elements ( silicon and oxygen) to bond those elements together as a compound; two atoms of oxygen for each atom of silicon. some glasses have additons of ionic compunds.

Conduction of electricity requires some mobility of electrons to move that potential charge through the material.

Electrons in covalent and ionic compounds in glass are too tightly bound to the molecule to conduct electricity.

Therefore, glass does not conduct electricity.