Walk through the same steps you will do in class, in the same order. Everything on the bench is touch-friendly: drag equipment with a finger or mouse, and tap buttons and items.
Electron colors: ● gold = electrons that came from calcium ● blue = a water molecule's own electrons ● violet = electrons from the hydrogen of HCl
Each step unlocks when you finish the one before it. Your progress and recorded numbers are saved on this device.