2.The valence electron configurations of the d-block elements (n-1dl-10ns-2;Pd:4d0 3dl-34s2 3d54s 3d5-84s23d104s1-2 4dl-25s2 4d4-55s14d55s24d7-85sl 4d05s0-2 5d1-76s2 5d9-106sl 5d06s0-2 3.The atom radii of the d-block elements 161 132 81 Mo 1383. The atom radii of the d-block elements 2. The valence electron configurations of the d- block elements 3d1-34s2 (n-1)d1-10ns1-2 ; Pd: 4d10 3d54s1 3d5-84s2 3d104s1-2 4d1-25s2 4d4-55s1 4d55s2 4d7-85s1 4d105s0-2 5d1-76s2 5d9-106s1 5d106s0-2