A sample of matter, either a single element or a single compound, that has definite chemical and physical properties: is an atom
An atom is the smallest unit of an element that still retains the distinctive behavior and definite chemical and physical properties of the element.
A single atom of an element keep its distinctive behavior, that's because the atom is the smallest unit of the composition of matter
What is an atom?
The atom is the smallest part of the composition of matter, it is indivisible and is composed of a nucleus that has protons and neutrons, and around the nucleus there are the electrons.
Learn more about the atom at: brainly.com/question/17545314
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