Question

How many valence electrons are shared, gained, or lost by each atom of the six compounds? • N2 • CCl4 • SiO2 • AlCl3 • CaCl2 • LiBr
I know this was already asked, but I still do not really get it...

Answer 1

I suggest you Google "Lewis structure of ???" and for the ??? type in the compound.
For N2 it will look something like this.
:N:::N: Since N is in group V it has 5 electrons in the outside shell or 10 electrons for the two atoms of N. So 6 electrons are being shared by the two N atoms. The others are done similarly.

Answer 2

Thanks!