In which of the following molecules can you confidently predict the bond angles about the central atom, and for which would you be a bit uncertain? Explain in each case. (a) H2S, (b) BCl3, (c) CH3I, (d) CBr4, (e) TeBr4.

Video transcript

Hi everyone here we have a question asking us for the falling identify the molecules that you can estimate the bond angles around the central atom with certainty and which it would be unsure about explained. So we're going to start off with silicon tetra fluoride. Its lewis structure would have silicon in the middle surrounded by four floor rides each with three lone pairs And this has no one pairs and it's surrounded by the same element. So it is tetra hydro And we can confidently say that it has a bond angle of 0.5 degrees. Next we have sulfur tetrachloride. So it will have the sulfur in the middle with one lone pair surrounded by four chlorine With three lone pairs each. It has a lone pair around the central atom. It is Trigon all by parameter but it will deviate due to the lone pair, so we are uncertain about it. Next we have chloroform, it has a carbon in the middle, Single bonded to three coins, Each with three lone pairs and then single bonded to a hydrogen. It has no long pairs, but it is surrounded by different elements. It is tetra he drew, but it will deviate due to the different atoms, so we are uncertain about its bond angles. Next we have water, It has oxygen with two lone pairs Single bonded to two hydrogen. It has long pairs surrounding the central atom. It is tetra hydro but it would deviate due to the loan pairs. So we are uncertain. And lastly we have boron try fluoride. It has boron in the middle surrounded by 34. It has no lone pairs, and it is surrounded by the same element. It is Trigon als planner, And we can be certain that it has 120° bond angle. So our answers are e certain. The uncertain see uncertain. Be uncertain, and a certain. Thank you for watching. Bye.