Question

depending on electronic configuration the properties of the elements vary in different groups explain why

Answer 1

electroni cofiguration helps in determinig the valency of an atom which determines the properties of an atom .
in a periodic table, elements have different electroni configuration due to which there properties differ

Answer 2

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The alkali metals and alkaline earth metals have one and two valence electrons (electrons in the outer shell), respectively; because of this, they lose electrons to form bonds easily and so are very reactive. These elementscomprise the s block of the periodic table.
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