This smallest unit is the atom.
The atom is the smallest unit of an element that has all the properties of the element.
The smallest identifiable unit of an element that retains the properties of the element is an atom.
The smallest unit of an element that maintains the properties of that element is an atom. Atoms are composed of a nucleus containing protons and neutrons, surrounded by electrons that determine the element's chemical properties.
An atom
An atom.
The smallest unit in an element is the atom.
An atom is a unit of matter that has all the properties of an element. It is the smallest unit of an element that retains the chemical properties of that element.
An atom.
An atom
An atom.
An atom. Anything smaller is an atomic particle from which all elements are made.An atom is the smallest particle of an element that has properties of that element.An atom is the smallest unit of an element that retains the properties of that element.
An atom of that element has all the properties of that element.