8.25—The trend in reactivity of Group 7 elements in terms of the redox reactions of Cl2, Br2 and I2 with halide ions in aqueous

Understand the trend in reactivity of Group 7 elements in terms of the redox reactions of Cl2, Br2 and I2 with halide ions in aqueous solution Students are expected to know the colours of the elements in standard conditions, in aqueous solution and in a non-polar organic solvent.

Use —the trend in reactivity of group 7 elements in terms of the redox reactions of cl2, br2 and i2 with halide ions in aqueous to connect the rule to the data and decision in the question.

This matters because —the trend in reactivity of group 7 elements in terms of the redox reactions of cl2, br2 and i2 with halide ions in aqueous determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply —the trend in reactivity of group 7 elements in terms of the redox reactions of cl2, br2 and i2 with halide ions in aqueous to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: —The trend in reactivity of Group 7 elements in terms of the redox reactions of Cl2, Br2 and I2 with halide ions in aqueous is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.