1.

do theycontainthe samenumberof shells ?

Answer»

SOLUTION :YES Alltheseelementscontainthe samenumberofshellsI.e.,TWOSHELLS- KandL
In ferencefromtheisacitvity, welearnthat theinaperiodall elementhavesamenumberof shellsbutnotsamenumberofvalenceelectrons.Aswe moredownwardsin a periodthenumberof valenceelectronsincreases by ONE


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