The largest jump in ionization energies is between Blank and Blank. The much larger value of Blank probably corresponds to removal of a Blank electron. The regular increases going from Blank to Blank correspond to sequential loss of Blank electrons. This indicates that there are Blank valence electrons in this element. Elements with this number of valence electrons are in group BlankA. target 1 of 9target 2 of 9target 3 of 9target 4 of 9target 5 of 9target 6 of 9target 7 of 9target 8 of 9target 9 of 9 Request Answer Provide Feedback