3.2+Physical+properties

Learning Goals (2 hours) Define the terms first ionization energy and electronegativity. Describe and explain the trends in atomic radii, ionic radii, first ionization energies, electronegativities and melting points for the alkali metals and the halogens. Describe and explain the trends in atomic radii, ionic radii, first ionization energies and electronegativities for elements across period 3. Compare the relative electronegativity values of two or more elements based on their positions in the periodic table.