5. What is the molar mass of Ca3(PO4)2? A) 87.05 g/mol B) 215.20g/mol C) 309.97 g/mol D) 430.39 g/mol 6. The average of the total mass of all an element's isotopes is called: A) the isotopic abundance B) the weighted average C) the average molar mass D) the average atomic mass

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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.