A sample of gallium contains two isotopes and its atomic weight is 69.72 amu. If the sample is composed of 60.10% 69G (68.926 amu), what is the identity and atomic weight of the other isotope? O a.71Ga (70.92 amu) Ob.70Ga (70.25 amu) OC 71Ga (70.25 amu) Od.70Ga (70.51 amu) Oe. 70Ga (70.92 amu)

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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.