Modern Periodic Law And The Present Form Of The Periodic Table

is not a possible electronic configuration. With and , the orbital is having only one value i.e. As the value of to

Other options are correct

Out of the given outer electronic configuration of atoms, the highest oxidation state is achieved by i.e. A large number of oxidation state is due to the fact the -electrons may get involved along with electrons in bonding as electrons in - orbitals are in an energy state comparable to -electrons. Oxidation state of other options are as follows: