10B 11B. AVERAGE ATOMIC MASS. Because of the existence of isotopes, the mass of a collection of atoms has an average value.
{"Image DocumentName": "10B11B. AVERAGE ATOMIC MASS. Because of the existence of isotopes, the mass of a collection of atoms has an average value.", "Image ImageDescription": "Boron is 20% 10B and 80% 11B. That is, 11B is 80 percent abundant on earth. For boron atomic weight. = 0.20 (10 amu) (11 amu) = 10.8 amu.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}