BASIC UNIT Crossword Clue
BASIC UNIT Crossword Clue
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Crossword Puzzle Infos
The basic unit of matter is the ATOM. An ATOM is the smallest particle of an element that can exist and still retain the properties of that element. It is composed of a nucleus, which contains protons and neutrons, and electrons that orbit around the nucleus. Atoms are the building blocks of all matter and are essential for life.