Question

Why does elctronic conigration of a atomrelate to its positioin the modern periodic table

Answer 1

• As we go down a group the number of e- increases by +2,+8,+8,+18,+18,+32,+32 and the number of shells increases with +1 and valency remains the same.
• As we go across a period the number of shells remain the same and the number of e- increases with +1.

• Period number = number of shells of an atoms

• Group number => if valence e- = 1 or 2 then group number = 1 o 2 n respectively

=>if valence e- = 3to8 then group number = valence e-+ 10

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