boron number of neutrons
Rating Newest Oldest. Best Answer: Boron 11 is one of two stable isotopes of Boron. and in natural samples about 80-81% of the element is Boron-11 and 19-20% is Boron-10. Boron-10 has 5 protons 5 neutrons and 5 electrons. Boron-11 has 5 protons 6 neutrons and 5 electrons.