Barron's AP Chemistry(2nd Edition) Advanced Placement Examination (Barron's How to Prepare Series) by NeilD. Jespersen Paperback, 562 Pages, Published 1998 by Barron's Educational Series ISBN-13: 978-0-7641-0474-9, ISBN: 0-7641-0474-8
Chemistry (Barron's College Review Series) by NeilD. Jespersen, Ph D. Jespersen Paperback, 512 Pages, Published 1997 by Barron's Educational Series ISBN-13: 978-0-8120-9503-6, ISBN: 0-8120-9503-0
"Neil D. Jespersen. however, to go back billions of years to obtain a sample
containing original amount of 238U, which is needed to determine the value for
yvo. The solution to this dilemma lies in the fact that each atom of uranium ends
up as an atom of lead. Therefore, if we take a rock sample and ... This could occur
, for example, if randon gas, which is part of the uranium series, escaped from the
rock before it decayed to the n ..."