16.1.2 General physical properties High m.p and b.p Tungsten (W)has the highest m.p among the elemental substances ·High hardness The hardest metal:Cr ·High densities The most dense metal:Os Good conductor of heat and electricity,and good ductibility(延展性)16.1.2 General physical properties • High m.p and b.p Tungsten (W) has the highest m.p among the elemental substances • High hardness The hardest metal: Cr • High densities The most dense metal: Os • Good conductor of heat and electricity, and good ductibility(延展性)