An atom of copper has a mass about four times greater than that of an atom of oxygen. What choice makes the correct comparison of the relative numbers of copper and oxygen atoms in 1,000 g of each element? a. There are one thousand times as many copper atoms as oxygen atoms.      b. There are one thousand times as many oxygen atoms as copper atoms.        c. There are four times as many copper atoms as oxygen atoms.     d. The number of copper and

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Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.