00:01
The first resonant structure for no3 minus can be found by saying that we have five valence electrons from the nitrogen plus three times six valence electrons from the oxygen plus one from the minus sign.
00:16
So that gives you 24 valence electrons to play with.
00:21
So now we know nitrogen is our central atom.
00:24
And what we're going to do is we're going to give it a single bond to one oxygen, a single bond to another action and a single bond to our third oxygen just to start with.
00:35
Now here, we know that we need a net negative one charge because of this, right? but the only way to get auctioned and not have a charge on it is to give it two bonds and two loan pairs.
00:48
If we try giving two of these actions double bonds, we will run out of octet electrons on our nitrogen.
00:57
So we can only give one oxygen a double bond, and once we've done that, we may as well make it have no formal charge.
01:05
One, two, three, four, five, six.
01:10
Six minus six is equal to zero.
01:12
So no formal charge in this one...