| 41. | Ziegler s work with free radicals led him to the organo compounds of the alkali metals.
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| 42. | Pure alkali metals are known examples of this.
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| 43. | When there are many helium atoms around, alkali metal ions can attract shells of helium atoms.
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| 44. | For example, if sodium is the alkali metal:
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| 45. | Many reactions exist with alcohol or amines as the proton donors and alkali metals and electron donors.
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| 46. | Such alkali metal bromides include cesium bromide.
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| 47. | This transfer is usually only energetically favorable if the aprotic solvent efficiently solvates the alkali metal ion.
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| 48. | The alkali metals have good chemical affinity for halogen and should have affinity for excited rare gases.
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| 49. | Other alkali metal sulfides behave similarly.
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| 50. | Among the atoms that can act as bosons are ordinary hydrogen, metallic sodium and alkali metals like cesium.
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