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    				| 1. | Whymostoftheclements have fractional atomic masses? | 
| Answer» Answer: The atomic masses of mostelementsare fractional because they exist as a mixture ofisotopesof different masses. Explanation: Most elements occur as a mixture of isotopes of different masses. The fractional atomic masses arise because of this mixture. Avg. mass = total mass of all atoms/number of atoms. Before we calculate the average mass of atoms, let's use an analogy. | |