Question

why do elements in the same group have similar properties?

Answer 1

Answer:

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Explanation:

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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Answer 2

$\fbox\red{αвѕωєя}$

thє єlєmєntѕ ín thє ѕαmє grσup hαѕ ѕímílαr numвєr σf vαlєncє єlєctrσnѕ. thєч hαvє ídєntícαl numвєr σf єlєctrσnѕ ín thєír σutєrmσѕt ѕhєll. є.g. αll thє αlkαlí mєtαlѕ ín grσup 1 hαvє 1 vαlєncє єlєctrσn, ѕσ thєч αll tєnd tσ rєαct thє ѕαmє wαч wíth σthєr ѕuвѕtαncєѕ.