Science Assessment

Two substances interacted and a chemical reaction occurred. What happened to the atoms and molecules of the substances during the chemical reaction?

1. All of the atoms changed into new atoms and formed new molecules.
2. All of the atoms stayed the same but rearranged to form new molecules.
3. The molecules and the atoms they are made of are the same after the chemical reaction.
4. Some atoms rearranged to form new molecules, and other atoms were changed into new atoms.