This element is hydrogen (H).
The smallest atom is hydrogen.
Hydrogen has the smallest atomic size of any element.
The smallest quantity of any element is one atom of that element. They do range in size due to their number of particles. The atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the center of the nucleus to the boundary of the surrounding cloud of electrons.
The smallest quantity of an element is an atom.
a quark or if you mean the smallest element hydrogen
ATOM
the smallest element is hydrogen of which its valency is one.
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 particle of an element is called an atom.
An atom is the smallest particle that is still recognisably the element
atom is the smallest part of element