| 11. | The properties of scandium compounds are intermediate between those of aluminium and yttrium.
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| 12. | Yttrium hydride is another inorganic material with photochromic properties.
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| 13. | Bromopyrogallol red forms blue to violet-blue complexes with Yttrium and Cerium.
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| 14. | Yttrium 90 is not a highly volatile substance.
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| 15. | Research into yttrium-90's medical potential began in the late 1980s.
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| 16. | He detected it as an impurity in yttrium oxide, Y 2 O 3.
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| 17. | Corresponding orebodies for yttrium tend to be rarer, smaller, and less concentrated.
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| 18. | The corresponding reaction with the yttrium salt fails:
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| 19. | Yttrium phosphate "', YPO 4, is a phosphate of yttrium.
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| 20. | Yttrium phosphate "', YPO 4, is a phosphate of yttrium.
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