General Chemistry (4th Edition)

Published by University Science Books
ISBN 10: 1891389602
ISBN 13: 978-1-89138-960-3

Chapter 3 The Periodic Table and Chemical Periodicity - Problems - Page 103: 48


(a) Thorium, Protactinium, Uranium, Neptunium & Plutonium are naturally occurring. (b) Thorium is most abundant. It is three times as abundant as Uranium (c) Americium is used in many smoke detectors (d) Curium is used in neutron activation analysis because it is a strong neutron emitter

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