An atomhas the electronicconfigurationof1s^(2) ,2s^(2) 2p^(6),3s^(2) 3d^(10) , 4s^(2) 4p^(5).Itsatomicweight is 80 . Its atomicnumberand thenumberof neutronsin itsnucleusshall be

An atomhas the electronicconfigurationof1s^(2) ,2s^(2) 2p^(6),3s^(2) 3

1.	An atomhas the electronicconfigurationof1s^(2) ,2s^(2) 2p^(6),3s^(2) 3d^(10) , 4s^(2) 4p^(5).Itsatomicweight is 80 . Its atomicnumberand thenumberof neutronsin itsnucleusshall be
Answer» 35 and 45 45 and 35 40 and 40 30 and50 Solution :`._(35)Br^(8) =1s^(2) 2s^(2) 3S^(6 ) 3d^(10)4P^(5)` n=A-Z=80 - 35 = 45 Atomicnumberof is 35 and no of neutronis45.