| 21. | Monazite is an important ore for thorium, lanthanum, and cerium.
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| 22. | Several countries have begun Thorium-based nuclear power programs.
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| 23. | Thorium is four times more abundant within nature than uranium.
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| 24. | Thorium is a fissionable material used in thorium-based nuclear power.
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| 25. | Thorium is a fissionable material used in thorium-based nuclear power.
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| 26. | The local soils are rich in minerals that yield thorium and zirconium.
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| 27. | The thorium dopant in the electrodes greatly enhances their electron emission characteristics.
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| 28. | Uranium-233 is made from thorium-232 by neutron bombardment.
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| 29. | 208 Pb is the end of the Thorium series from 232 Th.
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| 30. | Naturally occurring zircon has impurities such as uranium and thorium.
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