Answer:
[tex]\huge\boxed{\sf Atom}[/tex]
Explanation:
Atom:
- is the smallest particle of an element.
- has the same chemical properties as that element.
Element:
- is a pure substance.
- consists of same atoms.
- has atom as their smallest particle.
- cannot be broken down into simpler substances.
[tex]\rule[225]{225}{2}[/tex]