That is an atom.
The basic unit of matter is an atom. It is also the smallest part of an element that retains all the properties of that element. Since your question ended with an... I would say element fits best.
All types of matter have physical properties.
a molecule
The two properties of all matter is shape and volume.
For an element, it would be an atom. For a molecular substance, it would be a molecule. If it is an ionic compound, it would be a formula unit.
An atom of that element has all the properties of that element.
The atom is the smallest unit of an element that has all the properties of the element.
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.
The basic unit of matter is an atom. It is also the smallest part of an element that retains all the properties of that element. Since your question ended with an... I would say element fits best.
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.
This smallest unit of matter is the atom.
Correct answer= "Element" Element is the simplest type of matter; the basic unit from which all other matter is built
An atom.
The atom. Anything smaller is an atomic particle from which all elements are made.
The atom. Anything smaller is an atomic particle from which all elements are made.
If the substance is an element the answer is an atom. If the substance is a compound the answer is a molecule.
Molecules