1 The material consists of atoms that can not be subdivided.
2 All atoms of a chemical element have the same mass and properties.
3 Different chemical elements will have different kinds of atoms.
4 During chemical reactions, the atoms can only merge and split into separate atoms, but the atoms can not be destroyed and can not be changed during the chemical reaction.
5 A compound formed from the elements through the incorporation of atoms are not similar to a simple comparison