It's an atom because that contains a nucleus with the defining number of protons (plus some neutons) and the defining number of electrons, e.g. 12 protons/electrons makes it carbon.
The smallest particle of matter is called an atom. It is the basic unit of a chemical element and retains the properties of that element.
The smallest unit of Matter that retains the property of an element is the atom.
The atom.
The smallest particle of matter that retains the properties of the element of which it is a sample.
No, a particle is not the same as an atom. A particle is a small piece of matter, while an atom is the smallest unit of an element that retains the properties of that element.
An atom is the smallest building block of matter that retains the characteristics of that matter.
The smallest particle of matter that retains the properties of the element of which it is a sample.
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.
An atom is the smallest building block of matter that retains the characteristics of that matter.
An atom is the smallest building block of matter that retains the characteristics of that matter.
A quark is the smallest particle in matter.
An atom is the smallest particle in matter with unique chemical properties. Each element is characterized by the number of protons in its nucleus, which determines its chemical behavior.