- The atom is the smallest particle that has the properties of an element
- Gold is a kind of element
- So, gold atom is the smallest particle that can be classified as gold

So, gold atom is the smallest particle that can be classified as gold
[Question]What is the smallest particle of the element gold (Au) that can still be classified as gold?
[Context]- The atom is the smallest particle that has the properties of an element 
- Gold is a kind of element