207Pb206Pb
207Pb206Pb refers to a lead isotope pair. Lead-207 (207Pb) and Lead-206 (206Pb) are both stable isotopes of the element lead. Lead is a chemical element with the symbol Pb and atomic number 82. Natural lead is composed of four stable isotopes: 204Pb, 206Pb, 207Pb, and 208Pb.
206Pb is the most abundant stable isotope of lead, making up approximately 24.1% of natural lead. It
207Pb is the second least abundant stable isotope of lead, comprising about 22.1% of natural lead. It
The existence and abundance of these lead isotopes are fundamental to understanding geological timescales and the