Science Assessment ~ Topics ~ Substances, Chemical Reactions, and Conservation of Matter ~ Misconception SCM066

The number of different kinds of molecules, not the number of each kind of atom, is always conserved (AAAS Project 2061, n.d.).

Items that test for misconception SCM066 in this project (Original Project) and key idea ()
Item ID Number	Item Description	How Often the Misconception was Chosen	Select This Item for My Item Bank
SC089005	The number of each kind of atom stays the same during the combustion of propane. (This item uses circles to represent atoms.)	22%
SC102002	The number of each kind of atom stays the same during a chemical reaction. (This item uses circles to represent atoms.)	16%