2.Chemical properties of the elemental substances ·redox properties F2 C2 Br2 12 EΘ(X2/X)/V:2.8891.3601.0774 0.5345 X2 oxidizing ability:strong weak X reducing ability:weak strong Conclusion: Herein,F2:the strongest oxidant,I:the strongest reductant lo F2 Cl2 Br2 I2 X2 oxidizing ability： strong weak X- reducing ability: • redox properties Herein, F2: the strongest oxidant, I-: the strongest reductant 2. Chemical properties of the elemental substances (X 2 /X )/V： 2.889 1.360 1.0774 0.5345 − E Conclusion： weak strong