The answer to this item is the first choice, MOLECULES. The molecules are the smallest particles of both the compounds and even the biatomic elements. They are made up of atoms that are being held together through chemical bonds of different types depending on the type of atoms that shared the electrons.
To Earth, since it has the same radio and masses. This is what I believe.
A)electron orbits around the nuclues
I believe your answer is Favorable.
Hope this helps, and happy studying~!
~{Dunsforhands}
