In case of formation of ionic compounds the electronegativity difference between them is:
The difference between the electronegativity value of fluorine and sodium is more than 1.7 so the compound formed by them will be ionic in nature.
(a) What type of bond is formed between two atoms, when the difference in electronegativity between them is (i) high, (ii) low, (iii) zero? (b) Separate the following compounds into three categories- ionic, polar and covalent compounds; N2, NH4Cl, NH3, NO, NH4NO3, NCl3.