Atomic theory GCSE Chemistry tarsia - use as starter, plenary or revision

This is a fun yet challenging GCSE Chemistry tarsia for comparing different theories of atomic structure. There are 18 triangles with 21 pairs of questions and answers that make a kite shape. 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: names of scientists such E.R. Rutherford and J.J. Thomnson who played important roles in developing atomic theory, isotopes, electron shells and the periodic table, charge on subatomic particles and comparisons of the main models. The 'fjsw' file can be opened and modified with tarsia software. The tarsia software is free to download but there is not currently a version for Mac computers.