Students can memorize polyatomic ions, but may not understand what they look like, or how they behave. These 24 cards teach ion symbols and names in the context of their 3D structures, so students can connect patterns in reactivity to size, shape, and charge on the atomic level. Ions surround us in abundance, whether in water, soil, cooking, plants, or our bodies. Some dissolve. Some are colorful. Some are vital for life, while others can cause harm. There are patterns in how ions be