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Chemistry, 04.07.2020 23:01 Thisisdifinite

Os fósforos de segurança, aqueles usados para inflamar os combustíveis, são confeccionados da seguinte forma: a lixa, aquela parte que fica na caixa, é constituída de silício e de fósforo vermelho (uma das formas alotrópicas do elemento fósforo); a cabeça do palito contém as substâncias antimônio, clorato de potássio e óxido de ferro vermelho (óxido de ferro III).Em relação aos elementos químicos fósforo, silício e antimônio é correto afirmar: a) antimônio e o silício são representados graficamente por Sb e Si respectivamente. b) fósforo é classificado como elemento metálico e pertence ao grupo do enxofre. C)silício é um não metal e pertence ao grupo dos calcogênios. D) fósforo apresenta configuração eletrônica de última camada similar ao argônio. E) silício encontra-se localizado no segundo período da tabela periódica.

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Os fósforos de segurança, aqueles usados para inflamar os combustíveis, são confeccionados da seguin...
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