What unit is isotopic fractionation reported as?
A) parts per billion
B) parts per million
C) parts per thousand
D) parts per trillion

Question

Quizplus · Accepted Answer

Isotopic fractionation is typically reported as the ratio of the heavier isotope to the lighter isotope, expressed in parts per thousand (‰). For example, the isotopic fractionation of carbon-13 and carbon-12 in a sample might be reported as δ13C = −25‰.

What Unit Is Isotopic Fractionation Reported As