00:01
In this question, we are trying to determine which bonds are more polar, according to pairs given in the question.
00:11
And we do this using electronegativity.
00:14
So, electronegativity is the ability of an atom to draw in electrons with greater strength.
00:24
And polarity occurs in a bond when there is an unequal distribution of electrons.
00:29
So if we have greater electronegativity, we are going to have, or greater differences in electronegativity between our two atoms, we are going to have increased polarity because there will be an increased inequity in the distribution of electrons.
00:58
This is because one of the atoms will draw in electrons with more strength than the other.
01:02
So in part a, we are comparing nitrogen bonded to phosphorus and nitrogen bonded to oxygen.
01:12
Looking at figure 12 .3, we know that nitrogen's electronegativity value is 3 and phosphorus is 2 .1 and oxygen is 3 .5.
01:23
So first we do 3 minus 2 .1 and that cuts us 0 .9.
01:29
And then we do 3 .5 minus 3 .5 minus 3 .5.
01:33
And that gets us 0 .5, meaning that nitrogen and phosphorus will have a more polar bond.
01:40
In part b, we are comparing nitrogen and carbon versus nitrogen and oxygen...
