Use Mathematics The mass of an isotope can be approximated by adding
together the number of protons and neutrons in its nucleus. For example,
carbon-12 nucleus has 6 protons and 6 neutrons, and its mass is approximately
12 amu. Look at the models for the two isotopes of boron. Each model shows the
isotope's natural percent abundance and the composition of its nucleus. Use the
data to calculate the approximate atomic mass of boron.
5pt
5pt
5n0
6n0
20%
80%