15.1.2 The elemental substances 1.Physical properties of the elemental substances: F2 C12 Br2 State of aggregation g g 1 S Intermolecular force small large b.p./'C -188 -34 59 185 m.p./℃ -220 -102 -7 114 Color pale yellow red-brown yellow-green dark red1.Physical properties of the elemental substances： State of aggregation g g l s b.p./ ℃ -188 -34 59 185 m.p. / ℃ -220 -102 -7 114 Color pale yellow red-brown yellow-green dark red Intermolecular force small large F 2 Cl2 Br2 I 2 15.1.2 The elemental substances