31. Apparently these are known as the minor actinides . 32. The actinide series derives its name from the first element in the series, actinium. 33. The solubility and insolubility of trivalent and tetravalent actinides is like that of lanthanide salts. 34. The actinide elution sequence is reversed from that of the cation-exchange resin column. 35. These fast reactors are better suited for the transmutation of other actinides than thermal reactors. 36. Only zirconolite and perovskite can accommodate actinides . 37. Fast fission or fission of some heavier actinides will produce 121m Sn at higher yields. 38. These are actinides other than uranium and plutonium and include neptunium, americium and curium. 39. All of the transuranic actinides are unstable. 40. After production, the fermium must be separated from other actinides and from lanthanide fission products.
