The isotopes are elements with the same number of protons but different number of neutrons.
Boron atomic number is 5. That is the number of protons.
The natural occurring isotopes of boron contain 5 or 6 neutrons. Other, non stable isotopes, contain from 1 to 16 neutrons.
Which type of solution are you talking about?
The waves detect magnetic waves and the disturbances in the to locate where a earth quake will or may hit