(1) an element ends with electornic structure 3d3
1- find No of Energy levels occupied with electrons
2- number of sublevels occupied with electrons
3- number or orbitals occupied with electrons
4- number of unpaired electrons
question2
why????
1-there are no two elements having the same spectral ines?
2- the principal quantum number is whole integral number
علل
لايوجد عنصرين لهم نفس حطوط الطيف
2- ياخذ عدد الكم الرئيسى قيم حقيقية كاملة