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(a) What is the number of valence electrons in the atoms of first element in a period ?(b) What is the usual number of valence electrons in the atoms of the last element in a period ? |
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Answer» The number of valence electrons in the atoms of first element in a period is- (a) 1 The usual number of valence electrons in the atoms of the last element in a period is- (b) 8 |
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