what is the correct Lewis structure for CBr4?

Question

Show calculations to get the total number of valence electrons for the molecule.

Answer 1

start from here---

http://en.wikipedia.org/wiki/Lewis_dot_diagrams
hpe this helps

Answer 2

The quick answer is that the Carbon with no lone pairs.

The four Bromines are each single bonded to the Carbon, so that the carbon has four bonds coming off it, each obviously to one Bromine.

Furthermore, each Bromine has three lone electron pairs, meaning there are six electrons around each Bromine.

So from the periodic table, we see that Carbon should have FOUR valence electrons around it.

Also from the table we see EACH bromine should have SEVEN valence electrons around it.

So the total number of valence electrons should be:

1 Carbon molecule x 4 valence electrons = 4

Plus

4 Bromine molecules x 7 = 28

For a total of 32 valence electrons.

You can double check and count the electrons, making sure you count each single bond as two electrons.

You can also do calculations to make sure the charges are correct, but you didn't ask for that. Hope it helps.

Answer 3

you also need to to do the formal charge formula to make sure that the formal charges are the smallest possible so that you know that it is in the correct formation. If you go here: http://en.wikipedia.org/wiki/Lewis_dot_diagrams they tell you all about lewis diagrams and the exceptions for certain octets such as this one. The C is the central atom with single bonds connecting to the four Br on all four sides.

Answer 4

The chemical symbol for the atom is surrounded by a number of dots corresponding to the number of valence electrons.

Check out this website for more information:

http://www.ausetute.com.au/lewisstr.html

Answer 5

the structure on the left.

Answer 6

:x: , it is called " The Lewis Dot Diagram"

Answer 7

The answer is here. http://www.theeagleradio.com/help.jpg