A Tabela Periódica dos Elementos Químicos atual possui filas horizontais e cada uma delas representa um período ou série. A Tabela Periódica possui sete períodos e, a depender do nível (série) em que os elementos encontram-se, é revelada a quantidade de camadas eletrônicas.
Por exemplo, os elementos Oxigênio e o Flúor estão na segunda série e possuem duas camadas eletrônicas, o Potássio e Cálcio estão no quarto período e possuem quatro níveis eletrônicos (K,L,M,N) e assim vai.
Todos os elementos da Tabela Periódica são distribuídos em sequencia numérica de acordo com seus números atômicos. Excluido o primeiro período (onde localizam-se os elementos hidrogênio e o hélio), todos as séries começam com um metal e terminam com um gás nobre. O período mais curto possui dois elementos e o maior período possui 32 elementos.
Leia também sobre as Famílias da Tabela Periódica.
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Pingback: PORTAL VILA – Vila Margarida – SV/SP. – Famílias da Tabela Periódica
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