Which three elements represented in graph 1 do not have a value for electronegativity? explain why. (be sure to include their location on the periodic table and the definition of electronegativity) 1pt -- list the atomic numbers of elements in period 2 of the periodic table. locate the atomic numbers on your graph. what is the general trend in electronegativity as the atomic number increases across period 2? 2pts -- list the atomic numbers of elements in group 2 of the periodic table. locate the atomic numbers on your graph. what is the general trend in electronegativity as the atomic number increases down group 2? 2pts