the mass nos. of 3 isotopees of an element are 10, 12, and 14 units . Their percentage abundance is 80, 15 and 5 respectively. what is the atomic weight of the element?
i literally have no idea what to do here, i thought atomic mass and weight were the same thing????
Calculate this by taking the weighted average
(80×10+15×12+5×14) / (80+15+5) = 10.5u
This is very close to Boron 10.8
This should be helpful in understanding.