One way in which Earths evolution as a planet can be
Chapter , Problem 2.32(choose chapter or problem)
One way in which Earths evolution as a planet can be understood is by measuring the amounts of certain isotopes in rocks. One quantity recently measured is the ratio of 129 Xe to 130 Xe in some minerals. In what way do these two isotopes differ from one another? In what respects are they the same?
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