| 11. | This is a plant where beryllium medical surveillance should occur,
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| 12. | Beryllium used in spacecraft and aircraft comes from the ore.
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| 13. | The 2s electrons of beryllium may contribute to chemical bonding.
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| 14. | Beryllium difluoride, BeF 2, is different than the other difluorides.
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| 15. | The name " beryllium " was first used by W�hler in 1828.
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| 16. | Currently most beryllium is produced by reducing beryllium fluoride with purified magnesium.
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| 17. | Currently most beryllium is produced by reducing beryllium fluoride with purified magnesium.
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| 18. | Magnesium and beryllium are also potential materials for high-performance sails.
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| 19. | Electrolysis or heating of these compounds can then produce beryllium.
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| 20. | Beryllium becomes concentrated in felsic pegmatites in which chromium is almost absent.
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