
LEIA-SE: O actínio tem massa atômica duzentos-e-vinte-e-sete-vírgula-zero-vinte-e-oito.
Obs.: os hífens foram usados para facilitar a leitura, não tendo fundamento gramatical.
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This sentence is original and was not derived from translation.
added by alexmarcelo, January 27, 2013