Answer:
electron, proton, atom, compound, cell, organ
Step-by-step explanation:
An electron is a elementary particle and its the only one of its kind on this list so its the smaller
Protons are bigger than electrons but not as big as atoms, as both of them make up atoms in addition to neutrons
Atoms come next
Compounds are molecules made up of 2 or more different types of atoms
Cells are made of many organelles which are made up of proteins which are made up of compounds
And organs are obviously bigger than cells, think of your stomach!
Hope this helps!
Ben