Hello! I'd be happy to help you with that. The atom is the basic unit of matter and is composed of three main subatomic particles: protons, neutrons, and electrons.

1. Protons: These are positively charged particles found in the nucleus (center) of the atom. The number of protons in an atom determines its atomic number and identifies the element.

2. Neutrons: These are neutral particles (no charge) also located in the nucleus. Neutrons and protons together are called nucleons. The total number of protons and neutrons in an atom is called its mass number.

3. Electrons: These are negatively charged particles that orbit the nucleus in various energy levels or shells. Electrons are much smaller than protons and neutrons. The number of electrons in an atom is equal to the number of protons, making the atom electrically neutral overall.

In addition to these primary components, there are also subatomic particles known as quarks, which make up protons and neutrons, and leptons, which include electrons and neutrinos.

The distribution of these particles in an atom results in a dense, positively charged nucleus surrounded by a cloud of negatively charged electrons. The arrangement of electrons in their energy levels determines the chemical properties of an element and how it reacts with other elements.

If you'd like more information or have any other questions, please let me know!
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