noun
a single atom that is chemically bonded to a surface, typically used in the study of surface reactions and catalysis
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The adatom on the surface of the material plays a crucial role in its catalytic activity.
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If you look closely, you can see the adatom sitting on top of the metal.
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I accidentally knocked over the beaker and the adatom went flying everywhere.
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The lone adatom stood out amongst the sea of atoms, much like a unique individual in a crowd.