Which of the following statements is not part of Dalton's Atomic Theory?
1. Different elements will have atoms of different masses.
2. Atoms cannot be created nor destroyed.
3. When a substance or multiple substances react through a chemical change, the atoms rearrange to form new substances.
4. Atoms of the same element can have different masses.
5. Compounds must always have the same ratio of atoms present. If this ratio changes, the identity of the compound changes.
