Trends in first ionization energy EIE0 H 1312 He 2372 2500 Li Be 520 899 V Ne F 2081 2000 Na 496 Mg B 801 1086 1402 1314 1681 738 K3Iaua 1500 Ca A! S Ar 419 590 578 786 1012 Ci 1000 1251 1521 1000 Rb Ga 579 Ge 762 As 403 9 Se Br Kr uonezro 549 n 1351 500 Cs 3 Ba 5 Sn 709 Sb 9 1140 503 TI 834 Te 589 Pb 86 Xe 716 1008 Bi 1170 o 1A 7 Rn 2A 81 1037 3A 4A Increasing ionization energy 5A 6A 7A Increasing ionization energy 8A Copyright 2009 Pearson Prentice Hall,Inc.Trends in first ionization energy EIE>0