Hi, this is Dr. B. Let's do the Lewis structure
for HBr, hydrobromic acid.
On the periodic table, Hydrogen is in group
1, so it has 1 valence electron, and Bromine
is in group 7, sometimes called 17, it has
7 valence electrons; for a total of 8 valence
electrons.
We draw our H, we draw our Br, and we have
8 valence electrons.
So let's do this: let's put 2 right here.
That bonds Hydrogen and Bromine together;
4, 6, 8.
Now Hydrogen only needs two valence electrons
for a full outer shell.
It's satisfied, it has its full outer shell.
Bromine, it needs eight.
Take a look at Bromine, 2, 4, 6, 8.
It has eight valence electrons, and we've
only used 2, 4, 6, 8; the eight valence electrons
that we had to start with.
That is the Lewis structure for HBr.
This is Dr. B., and thanks for watching.
