Bromine79
Bromine-79 is a stable isotope of the element bromine. Its nucleus contains 35 protons and 44 neutrons, giving it a mass number of 79. Bromine-79 is one of the two naturally occurring isotopes of bromine, with bromine-81 being the other. Naturally occurring bromine is composed of approximately 50.69% bromine-79 and 49.31% bromine-81. This isotopic abundance means that the average atomic mass of bromine, as found on the periodic table, is a weighted average of these two isotopes. Bromine-79 has a nuclear spin of 1/2, which makes it detectable by nuclear magnetic resonance (NMR) spectroscopy. This property is useful in analytical chemistry and for studying molecular structures. Unlike radioactive isotopes, bromine-79 does not undergo radioactive decay and therefore has an infinite half-life. Its presence is essential for the chemical properties and reactions of bromine compounds.