Scientists get rare glimpse of 'nesting doll' isotope nitrogen-9
With five more protons than should be stable, the newly discovered nitrogen-9 isotope sits right on the borderline of physical possibility.
https://www.livescience.com/chemistry/scientists-get-rare-glimpse-of-nesting-doll-isotope-nitrogen-9 #N #NestingDoll #nitrogen9 #protons #oxygen #isotopes #beryllium #DripLine