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18-11The atomic numbers of elements of a period are given below;elementsLiBeBCNatomic number3567the valency of an element is determined bya. the number of valence electron present in the outermost sale of the atomb. the number of electron present in atomc. the number of valence electron present in the first two cellsd. the number of valence electrons present in the nucleus​

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i DONT no SORRY.rearly sorry.



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