the electrons in the atom of four element a b c and d are distributed in three shell having 1,3,5 and 7 electrons in the outermost shell respectively . state the period in which these elements can be placed in the modern periodic table. write the electronic configuration of atom A and D and the molecular formula of the compound formed when A and D combine.
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1) 3rd Period ( as all the elements are filled in three shells)
2)A=2,8,1
3)D=2,8,7
4)Molecular formula is 'AD'
2)A=2,8,1
3)D=2,8,7
4)Molecular formula is 'AD'
JessiJ:
The 4th one I am not sure.
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