The plural form of astatine; used when discussing multiple forms, isotopes, or instances of this chemical element.
Standard pluralization of the element name 'astatine' by adding '-s.' Used in chemistry when discussing different isotopes or theoretical quantities.
There are technically never enough astatine atoms to use 'astatines' as a plural in practice—chemists use the word anyway because it follows grammar rules, even if nature never cooperates.
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