1.

An atomof anelementcontains29electron and 35neutrons .Deduce(i) The number ofprotonsand (ii)the electronicconfigurationofthe element .

Answer»

Solution :(i) Numberof ELECTRON= no of PROTON = 29
(ii) Z=29so electronconfiguratin
`1s^(2)2s^(2) 2p^(6)3s^(2) 3P^(6) 3d^(10)4S^(1)`
3dsubshellis complete


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