Quatro novos elementos foram descobertos por cientistas japoneses, russos e norte-americanos e confirmados pela IUPAC (União Internacional de Química Pura e Aplicada). 113, 115, 117
Os processos de obtenção industrial de vários compostos químicos podem ser mais complexos do que parece. Muita gente se pergunta como várias coisas são
O Dia do Índio é celebrado, nos países americanos, em 19 de abril, por isso, resolvemos relembrar a importância dos índios, principalmente no período da
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