What is the Lewis structure for BBr3?

Answer 1

This is hard to answer without being able to draw, but I will do my best!

First of all, each element needs 8 electrons (except hydrogen which only needs 2, i don't know why, it just does). A dash between two elements equals 2 electons. One element needs to be in the middle and the rest are on each side of it. Elements with the most electronegativity are almost always in the center ( just remember the ones closest to Fluorine are the strongest.).

Now how many electrons do we need total? Br is in the 17th group, so it has 7 valence electrons. C is in 14, so it has 4 valence electrons. H is in group 1, which means 1 electron. However, there are three of them, so there are three electron from H. Now, add them up. 7+4+3=14, which means there needs to be a total of 14 electrons. Now to start your drawing:

First of all, Br is closest to Fluorine, so it will be in the middle. Next, the Hydrogens should be put on 3 of the sides (it doesn't matter which sides). To make it less confusing, I will give the sides: up, down, left, and right. Put H on the "up", "left", and "right" sides of Br. Next, put the C on the "down" side. Draw one dash each for all the elements connecting to Br. H, being the weird element is done now. It only needs 2 electrons and the dash counts as 2. Now take a moment and count how many electrons have been used. you should have 4 dashes, which means 8 electrons have been used. 14-8=6. Now we have 6 more electrons to use. Put 2 dots each on the "left", "right", and "bottom" sides of C. Why? C still needs 6 more electrons because it "wants" a total of 8. Each dot is an electron. Now if you check the drawing, each H's should have 2 electrons each (1 dash each), the Br should have 8 electrons (4 dashes) and the C should have 8 electrons (1 dash, 6 dots).

Lol, that would have been SOOO much easier if I could just draw it out!! I hope I helped you understand how to do this in the future :) Also, I know it is right because I had this for homework the other day and I got it correct, just so you don't wonder if this is reliable or not ;) Good luck! (And if this is homework I hope you get the rest of them right!)

Answer 2

There is a single line between the H and Br and three lone pairs of electrons around Br.

Answer 3

.. I think it's H-Br: .. H has 1 valence electron and Br has 7. The Br has 2 dots on top, 2 after it and 2 dots under it. It doesn't show up like that when i typed it sorry.

Answer 4

:

: Br :

: : :

:Br - B - Br :

: :

Basically 3 lone pairs on each Br. Three bonds, trigonal structure.

Answer 5

H : Z = 1 so one electron wich wants to meet another one

Br : Z = 35 so 3 "doublet non liants" and one free electron

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H-Br/

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Answer 6

There is a single line between H & Br & 3 pairs of dots (6 dots) around Br.

Answer 7

hydrogen carbon hydrogen 2(hydrogen twice which explains the two in the second H symbol) bromine learning this in class hope it helps!

Answer 8

H-Br with two lone pairs around Br