This is a fun GCSE chemistry tarsia for revision of the halogens. There are 16 triangles with 18 pairs of questions and answers that make a parallelogram. I suggest that the A4 tarsia is printed on card and then the outline is cut out. Students can then quickly cut out the individual triangles. Included are the following topics: state of the halogens at room temperature (astatine is unstable), uses of the halogens, trend for melting point and reactivity with group 1 metals, charge of group 1 metal and halogen ions. The tarsia software is free to download but there is not currently a version for Mac computers.
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£3.00