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how to calculate the average atomic mass of bromine atom Given; 2 isotopes 79/35 Br[49.7] and 81/35 Br[50.3] |
| consider 100g of Br. There 49.7 g of (79,35) and 50.3 g of (81,35) isotopes are present So, the average mass will be= {(49.7 x 79) + (50.3 x 81)}/100 = 80% |
