The standard International System of Units (SI) unit of mass is the kilogram(kg). The kilogram is 1000 grams (g), first defined in 1795 as one cubic decimeter of water at the melting point of ice.
H. The atom would no longer be aluminum
If you added a proton to an atom of aluminum it would become a silicone ion
Answer:
They aren't listed as a whole number, because an atom's mass is not always a whole number. The mass differs between types of atoms as well.
H :) (I tried sorry if im wrong)
