The particle consisting of two or more atoms combined together in a specific arrangement is called a molecule.

Here's a breakdown:

* Atom: The smallest unit of an element that retains the chemical properties of that element.

* Molecule: A group of two or more atoms held together by chemical bonds. The atoms in a molecule can be of the same element (e.g., O₂ - oxygen molecule) or different elements (e.g., H₂O - water molecule).

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