Why are there no electronegativity values for noble gases?

Related questions

1. What is the highest electronegativity?
2. Why does electronegativity increase?
3. Which is most likely true about electronegativity?
4. Does electronegativity increase from top to bottom?
5. Do Metals have low or high electronegativity?
6. How is Mulliken electronegativity calculated?
7. Does electronegativity increase down a period?
8. Why does group 17 have the highest electronegativity?
9. How does electronegativity affect oxidation?
10. Why does francium have the lowest electronegativity?

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1. #since
2. #already
3. #attraction
4. #electron
5. #gases
6. #electrons
7. #their
8. #amount
9. #shells
10. #noble
11. #attract
12. #between
13. #electronegativity
14. #measures
15. #outer
16. #eight