Question

which statement best explains why the elements in group 18 do not have electronegativity values? (1 point)
the elements are too large.
the elements do not have electrons.
the elements have only one electron shell.
the elements have filled valence levels.

Explanation:

Electronegativity is the tendency of an atom to attract electrons. Group 18 elements (noble gases) have completely filled valence electron shells. They are stable and do not tend to gain or lose electrons, so they do not have electronegativity values. The other options are incorrect: noble - gas atoms are not the largest in the periodic table (some alkali metals and alkaline earth metals are larger), they do have electrons, and not all of them have only one electron shell (e.g., argon has three electron shells).

Answer:

The elements have filled valence levels.