What Is An Atom

An atom is the fundamental unit of matter, the smallest particle of an element that retains the chemical properties of that element. Atoms are composed of three main subatomic particles: protons and neutrons in the nucleus, which are surrounded by electrons in specific energy levels or electron shells. The number of protons defines the element, while electrons determine its chemical behavior and bonding properties. Understanding atoms is crucial in chemistry and physics, as they are the basic building blocks of all matter and play a fundamental role in explaining the properties and interactions of substances in the universe.
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