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/ˈastətiːn/ · noun
A highly radioactive chemical element (symbol At), one of the halogens, with atomic number 85..
Astatine, for instance, is practically unstudied. It has a name and a place on the periodic table (next to Marie Curie's polonium), but almost nothing else.
Use astatine when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Astatine means A highly radioactive chemical element (symbol At), one of the halogens, with atomic number 85..
Common synonyms include alabamine, anglohelvetium, atomic number 85, at.
The opposite depends on the specific sense.
Astatine, for instance, is practically unstudied. It has a name and a place on the periodic table (next to Marie Curie's polonium), but almost nothing else.
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