why do all emlent of same group have similar property
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(i) All the elements of a group have similar chemical properties because they have same no. of valence electrons in their outermost shell.
(ii) All the elements of a period have different chemical properties because they have different no. of valence electrons in their atoms.
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The elements in a given group possesses similar electronic configuration, as the number of electrons in the respective outermost shells is the same. So, they have similar physical and chemical properties.
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