Final answer:
The highest electronegativity is found in fluorine, located at the upper right corner of the periodic table with a value of 4.0.
Step-by-step explanation:
The highest electronegativity is found at the upper right corner of the periodic table, with fluorine having the highest electronegativity value. According to the Pauling scale, developed by the Nobel Prize-winning chemist Linus Pauling, fluorine has an electronegativity value of 4.0, which is the highest of all elements. The periodic trends indicate that electronegativity values increase as you move from left to right across a period and decrease as you move from top to bottom down a group. Therefore, nonmetals, particularly halogens like fluorine, are usually the elements with high electronegativities.