The symbol for gold from the periodic table of the elements is Au. Pure gold consists entirely of this element. How long could you repeatedly cut a kilogram of pure gold in half until the portion remaining, if split, would then no longer display the chemical properties of gold?

You could do this until you had only a single atom of gold remaining. You could do this until you had only a single gram of gold remaining. You could do this until you had only a single subatomic particle remaining. You could do this until you had only a single molecule of gold remaining.