Boron:atomic number-5,valency-+3,atomic mass- 11amu
4.88x10^20 H2O2 molecules
Yes, i expect to find an atom with 26 protons and mass number of 52, because if it has different number of neutrons it could be a type of isotope. As if there is different number of neutrons in an atom, they make an isotopes of that atom and if we add the number of neutrons and number of protons we will find the mass number of that atom.
