Answer:
Atoms are the smallest units of matter.
Step-by-step explanation:
I would suggest using Dalton's laws of matter to help you! These laws include:
1: All matter is made of atoms. Atoms are indivisible and indesctructible
2: All atoms of a given element are identical in mass and properties
3: Compounds are formed by a combination of two or more different kinds of atoms
4: A chemical reaction is a rearrangement of atoms
Hope this helps, have a great day!