00:01
Dear students, the question is to draw the lewis structure for bf3 boron trifluoride including lone pairs.
00:13
Now boron trifluoride, boron is the central atom, it has five electrons, so the electrons are like this and each fluorine is having seven electrons, this one, here one electron with boron, so in this way boron trifluoride molecule is, so here this fluorine, this electron, then these are the unshared pairs and here another fluorine, so this is the lewis structure.
00:59
Here boron is having in this way four pairs of, boron is having three electrons, sorry, boron is having three electrons in its outermost orbit because boron is 1s2 2s2 2p1, so three electrons in its outermost orbit, therefore this is the lewis structure of bf3 molecule.
01:23
Then what is the molecular shape of bf3? it is three pairs and symmetrical molecule, therefore it is triagonal, triagonal or triangular, so the shape is like this bf, bf, bf...
