Rank the atoms from lowest energy to highest energy.
A) Surface atom
B) Step adatom - an atom that has diffused to the ledge, but is isolated on the ledge
C) Kink atom - atom on the edge but only has an atom on one side
D) Step atom - on the edge but has atoms on either side
E) Adatom - an atom that is isolated on the surface Ignore the vacancies.
You can rank according to the letters (A-E) Step atom 7 Kink otem