The atom that has 6 valence electrons and high electronegativity is oxygen (O). Oxygen is located in Group 16 (or Group VIA) of the periodic table, and it has 6 valence electrons in its outermost energy level. It has a relatively high electronegativity value, which means it has a strong attraction for electrons when forming chemical bonds. Oxygen's electronegativity value is 3.44 on the Pauling scale, which is one of the highest values among the elements.