Answer: The elements with properties intermediate between those of metals and nonmetals are called semimetals (or metalloids).
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Sn + CuSO4 → Cu + SnSO4 I think this should be the answer. Hope it helps.
A particle is defined as a small potion of matter. From its definition, then a single atom can be considered as an atom. This is because an atom is the smallest unit of matter. Also, a molecule can be considered as a particles since it is a small portion of a certain object.