Why nitrogen is considered to be less electronegative than chlorine. Nitrogen should be more electronegative as I was reading some content about this and I read some reasonable arguments:
- $\ce{NCl3}$ in $\ce{H2O}$ gives $\ce{NH3}$ and $\ce{HOCl}$, which proves that nitrogen is negatively charged because it attracts the positively charged hydrogen in $\ce{H2O}$ to form $\ce{NH3}$ and chlorine combines with the negatively charged $\ce{HO-}$ radicals.
- $\ce{HNO3}$ is stronger than $\ce{HClO3}$, though chlorine and nitrogen have the same oxidation state ($+5$): $\mathrm{p}K_\mathrm{a}(\ce{HNO3}) = -1.4, \mathrm{p}K_\mathrm{a}(\ce{HClO3}) = -1$.
But in spite of that electronegativity value for nitrogen is considered to be $3.04$ while that of chlorine is $3.16$. Why?