| 1 | Which of those two is more electronegative? The oxygen. | |
| 2 | And, this is the difference in electronegativity between the two elements, all right? | |
| 3 | So carbon is to the right of hydrogen, this is more electronegative. | |
| 4 | If you look at the electronegativity difference 73 for sodium iodide, it is 1.73. | |
| 5 | And the functionality goes as the square of the difference in electronegativity. |