IA IIA electronegativity Li Be Decreasing ionization energy and Increasing metallicity and reductibility Increasing atomic Na Mg K Ca Rb Sr radius Cs Ba Decreasing atomic radius Decreasing metallicity and reductibility Increasing ionization energy and electronegativity electronegativity Decreasing ionization energy and Increasing metallicity and reductibility Increasing atomic radius IA IIA Li Be Na Mg K Ca Rb Sr Cs Ba Decreasing atomic radius Decreasing metallicity and reductibility Increasing ionization energy and electronegativity