The subatomic particles that form the basic structure of atoms are called protons, neutrons, and electrons.

Here's a breakdown:

* Protons: Positively charged particles found in the atom's nucleus. They determine the element's atomic number.

* Neutrons: Neutrally charged particles also found in the nucleus. They contribute to the atom's mass.

* Electrons: Negatively charged particles that orbit the nucleus in shells or energy levels. They participate in chemical bonding.

These three particles together make up the structure of every atom in the universe!