Question

Which nonmetals are bad conductors of heat and electricity eg

Answer 1

However, the electrons in the non-metals are tightly bound to their atoms and are not free to flow. This makes non-metals poor conductor of electricity. Quora User, Engineer, musician, all around inquisitive fact-loving dude. Graphite, electrolytes, andsilicon (under certain conditions) are excellent conductors.

Answer 2

To become conductor in solid phase require free electrons. Non-metals do not have any free electrons therefore unable to conduct heat and electricity.