| 11. | Lighter astatine isotopes have quite magic number corresponding to a filled neutron shell.
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| 12. | Astatine-217 is produced via the radioactive decay of neptunium-237.
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| 13. | Some of astatine's reported properties are nonmetallic.
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| 14. | This results in elemental hydrogen gas and astatine precipitate.
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| 15. | Finally, radiolysis from astatine nuclei could sever the H-At bonds.
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| 16. | I am writing astatine and I have a question about its alpha decay characteristics.
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| 17. | The structure of solid astatine is unknown.
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| 18. | As mentioned, there are grounds for instead referring to this compound as astatine hydride.
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| 19. | No astatine fluorides have been discovered yet.
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| 20. | Astatine's alpha decay energies follow the same trend as for other heavy elements.
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