If you have an unknown material that conducts electricity and heat well, what kind of substance would it be?(1 point) Responses It must be a nonmetal. It must be a nonmetal. It could be a metal or a nonmetal. It could be a metal or a nonmetal. It must be a metal. It must be a metal. It must be a metalloid. It must be a metalloid.
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It could be a metal or a metalloid.
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