Final answer:
Noble gases are the atoms that do not usually form compounds.
Step-by-step explanation:
The atom that does not usually form compounds is the noble gas. Noble gases are elements that are found in Group 18 of the periodic table, including helium, neon, argon, krypton, xenon, and radon. These elements have a full valence shell of electrons, making them stable and unreactive. Due to their stable electron configuration, noble gases rarely form compounds with other elements.
Learn more about Noble gases