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.
Some isotopes are radioactive because their neutron/proton ratios are too large or too small. Explanation: The neutron/proton ratio (#n//p#) of a nucleus determines its stability. If #n//p# is too large or too small, the nucleus is unstable. It decays to form a more stable nucleus. The greater #n//p# value of carbon-14 is too large for a carbon atom. This makes the nucleus unstable.