SEARCH Articles Figures Tables Energy trends First ionization energy periodic trends Groups ionization energies trends Ionization energy Ionizing energy Periodic table ionization energy trends Periodic trends in first ionization energies Periodic trends in ionization energy Periodic trends in ionizing energies Periodic trends ionization energy Periods ionization energies trends Trends in First Ionization Energy Trends in Ionization Energy Trends in Second and Successive Ionization Energies