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/pəˈləʊ.nɪ.əm/ · noun
A rare, highly radioactive chemical element (symbol Po) with atomic number 84..
Use polonium 210 when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Polonium 210 means A rare, highly radioactive chemical element (symbol Po) with atomic number 84..
Common synonyms include po, atomic number 84.
The opposite depends on the specific sense.
Use polonium 210 where its definition matches the intended context.
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