a rock ?
No, brick is a very poor conductor.
yes it is but a very poor conductor
A nail is a very poor but srong so middle conductor
it is a conductor, but rather a very weak one. VERY WEAK
Yes, gold is an excellent conductor, and therefore a very poor insulator.
It is a poor conductor.
lemon juice with salt will act as a very good conductor also vinegar is a conductor but not a very good one
No—Eureka wire is not a better electrical conductor than copper. If by “Eureka wire” you mean Eureka resistance wire, it is typically a nickel-chromium-based alloy designed to have relatively high electrical resistance, making it useful for heating elements and resistors rather than efficient current transmission. Copper, by contrast, has much lower electrical resistivity, so it conducts electricity far more efficiently. In practical terms, choose copper when you want low-resistance electrical conduction; Eureka wire is useful precisely because it resists current.
Yes, gold is an excellent conductor, and therefore a very poor insulator.
No, xenon is not a conductor of electricity. It is a noble gas and does not readily conduct electricity under normal conditions.
Cobalt is not a very good conductor as copper or silver; the electrical resistivity is 62,4 nohm.m
helium is an insulator (poor conductor) of heat