This product is a set of cards, half of which are periodic table squares and the other half of which are Bohr models for those elements. There are a few that are designed not to match. Each card should be cut out and possibly laminated to hold up better. The sets should then be given to students in groups of 2 or 3. Students should try to match the pairs, providing an explanation of how they matched them. This is best done at the beginning of a unit, even before vocabulary is introduced, so students get a chance to truly experience inquiry into this subject. At the end of the activity, students should have at least one of the following inferences:
1. The top number (atomic number) shows the number of orbs on the rings (electrons)
2. The top number (atomic number) also matches one of the numbers in the middle.
3. The bottom number (atomic mass) is very close to the number you would get if you add the two number in the middle of the model. (protons and neutrons)
This sets up success when you begin talking about how these topics are related because they have discovered it for themselves.