action - something that you do protective - (being) something that protects protective action - things you do, to protect yourself or other people (from something) recomâ¦mendations - someone has done some research; this is a list of what they think is good protective action recommendations - a list of things someone thinks you should do to protect ...
Stable isotope analysis gives an independent measure of fractionation such that if, for instance, a sample is 1.5% heavier in 13C than modern standard carbon through the effects of fractionation, then it will be 3% heavier in 14C than it would have been had fractionation not taken place.
Share. This is a list or table of elements that are radioactive. All elements have radioactive isotopes. This table contains the elements that have no stable isotopes.Each element is followed by the most stable known isotope and its half-life.This list is sorted by increasing atomic number.Reference: International Atomic Energy Agency ENSDF database (Oct 2010).his table contains the elements that have no stable isotopes. Each element is followed by the most stable known isotope and its half-life. This list is sorted by increasing atomic number. Reference: International Atomic Energy Agency ENSDF database (Oct 2010).