Question

why are metal good conductor of the electricity whereas glass is bad conductor of electricity?

Answer 1

Metal are good conductor of electricity because in metals there bonds are not tight and they have free electron where as glass is bad conductor of electricity brcause they are tightly bond and there are no free electron.
I HOPE YOU UNDERSTAND

Answer 2

metals are good conductor of electricity because they have free electrons in the outer shell of the atoms which are not lightly bound to their atoms and free to transport electricity. however, the electron in the glass are little tightly bound to their atoms and are not free to flow. this makes glass is poor conductor of heat

hope it helps uh!