Average Atomic Mass Did you ever notice that the mass number on the periodic table is not a whole number
{"Image DocumentName": "Average Atomic MassDid you ever notice that the mass number on the periodic table is not a whole number?", "Image ImageDescription": "There are the decimal numbers on the periodic table.   This is because it is an average mass for all the isotopes of each atom.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}