5p_x    5p_y    5p_z

       4d_xy    4d_xz    4d_yz    4d_x2_y2    4d_z2

5s    

Select an element: 37 Rubidium Rb 38 Strontium Sr 39 Yittium Y 40 Zirconium Zr 41 Niobium Nb (*alert) 42 Molybdenum Mo 43 Technetium Tc 44 Ruthenium Ru 45 Rhodium Rh 46 Palladium Pd (special) 47 Silver Ag 48 Cadmium Cd 49 Indium In 50 Tin Sn 51 Antimony Sb 52 Tellurium Te 53 Iodine I 54 Xenon Xe

The total number of electrons represented is

d^4-9 Rule Exception