00:03
Hi there.
00:04
To answer this question, we need to draw the lewis structure.
00:07
That's what the little hint tells us.
00:10
We have boron trifluoride.
00:13
So when drawing a lewis structure, the first thing we need to do is determine how many valence electrons we have to work with.
00:18
Boron's in group 3a of the periodic table, so it has three valence electrons.
00:23
We have three fluorines.
00:25
Each fluorine is a halogen in group 7a.
00:29
All halogens have seven valence electrons.
00:32
This gives us a total.
00:33
Of 24 valence electrons.
00:38
And when we draw a lewis dot structure, each valence electron is represented as a dot.
00:43
So that means our completed lewis structure needs to have exactly 24 dots.
00:48
All right, let's go ahead and draw out the skeleton structure.
00:52
We know that the single element is always in the center, unless we are told otherwise, and then surrounded by the three florings.
01:02
We also know that each flooring has to be held to the boron, by at least a single bond, which means a pair of electrons.
01:11
So that uses six of our electrons...