An atom.
The smallest subdivision that retains all of the properties of a molecular compound is a molecule, and the smallest subdivision that retains all of the properties of a ionic compound is a formula unit.
The smallest particle that retains the properties of an element is an atom. Quarks and leptons are just a family of elementary particles and do not carry any properties of the element.
Quarks are the smallest parts of an element that have been discovered so far.
The atom is the smallest particle of an element that retains it's characteristics. Sub-atomic particles such as protons, neutrons and electrons form the atom and it is the amount of each of these sub-atomic particles that make the element that element.
That's an atom of gold. An atom is the smallest representative particle of an element.
The smallest part of an element that is still that element is an atom. Atoms are the fundamental building blocks of all matter and are made up of a nucleus containing protons and neutrons, surrounded by electrons.
The smallest part of an element that retains all its properties is an atom. Each atom is made up of protons, neutrons, and electrons that determine the chemical behavior and physical properties of the element.
retains the chemical identity of that element.
The smallest unit of an element that is still that element is an atom. Some elements normally exist as molecules, but under some circumstances these can be broken down to individual atoms.
A molecule is the smallest part of a compound that still retains the properties of said compound. As the atom is the smallest particle of an element into which it can be divided and still retain all the properties of that element, the molecule is the atom's analog for a compound.
The atom is the smallest particle of an element that retains it's characteristics. Sub-atomic particles such as protons, neutrons and electrons form the atom and it is the amount of each of these sub-atomic particles that make the element that element.
If that substance is an element, the smallest part is the atom which, if broken down further into atomic particles, loses its identity.