[Jessica508]

Did I do these right?

[Corribus]

No, you did not.  You need to do a better job counting bonding electrons.  Each single bond contributes two, and we divide by two because formal charge formalism assumes complete covalency (equal sharing between adjacent atoms).  That goes for sigma AND pi bonds.

[Jessica508]

Thank you. So this should be right then?

[Corribus]

Some are right, some are still wrong.  Let me amend my prior post: you need to do a better job counting bonds.  It may be helpful to draw out each molecule showing every bond that is there.

For example, in the molecule at right (H₂C-N≡N), how many bonds does the carbon have?

[Jessica508]

would it be 1  bond?