How would you react to the statement that the electron(eg)ativity of 'N' on Pauling scale is '3.0' in all the nitrogen compounds?

Most of the organic chlorides, bromides and iodides react with certain metals to give compounds containing carbon - metal bonds. How will you prepare the above compound ?

How is sodium fusion extract prepared? Using this, how will you detect the presence of Nitrogen, Sulphur and Halogen in an organic compound?

If the nitrogen atom had electronic configuration '1 s^7', it would have energy lower than that of the normal ground state configuration '1 s^2 2 s^2 sp^3', because the elec- trons would be closer to the nucleus. Yet, '1 s^7' is not observed because it violates: