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The smallest unit of an element that maintains the properties of that element is the atom.
The smallest unit in an element is the atom.
The atom is the smallest unit of an element that has all the properties of the element.
The smallest unit of an element is the atom. There are smaller components of atoms, but they no longer hold the properties of the element that belong to an atom of that element. There are smaller things called quarks but they are not very well understood. Of the neutron, proton and electron, the electron is by far the smallest.
molecule
It is an atom.
The smallest identifiable unit of an element that retains the properties of the element is an atom.
An atom.
An atom
An atom of that element has all the properties of that element.
An atom.
That would be AN ATOM.