Chemistry · C4
Chemical reactions
Some changes make something new and some only move what was already there. This unit is about telling which is which, seeing what a reaction does to the atoms underneath, and learning the two ways chemists write one down.
- 1Chemical change vs physical changeContrast
- 2Reactions rearrange atomsModel
- 3Word equationsModel
- 4Mass in a reactionQuantitative
- 5Symbol equations and balancingModel