A student creates a chart listing some characteristics of four substances. Characteristics of Four Substances Substance 1 Substance 2 Substance 3 Substance 4 A mixture Poor conductor of heat and electricity Forms crystals when solid High luster 0 Conducts electricity when dissolved in water Brittle when solid Contains particles that cannot be seen with the naked Good conductor of heat and electricity Malleable eye Dull appearance with no luster Ductile Hard and brittle when solid Cannot be separated by filtration High melting and boiling points Which substance is most likely a metal element?​