| 31. | Several elements were discovered by spectroscopic means, such as helium, thallium, and cerium.
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| 32. | Hypochlorite has been used to oxidise cerium from its + 3 to + 4 oxidation state.
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| 33. | It could be obtained by the reaction of oxalic acid with cerium ( III ) chloride.
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| 34. | Cerium has a variable electronic structure.
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| 35. | Functional groups compatible with the parent organometallic compound are generally also stable upon transmetallation to cerium.
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| 36. | In this compound each cerium atoms is surrounded by twelve oxygen atoms from six nitrate groups.
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| 37. | Smith investigated the preparation of cerium compounds for use as titrants in oxidation and reduction reactions.
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| 38. | Promethium belongs to the cerium group of lanthanides and is chemically very similar to the neighboring elements.
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| 39. | Such cerium-depleted light lanthanide mixtures have been widely used to make petroleum-cracking catalysts.
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| 40. | Cerium Technology is an energy, trading and technology investment firm founded by Allegro founder Eldon Klaassen.
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