how many bonds are normally formed to atoms of each of the following elements when they are in most organic molecules H, O, F, C, CI, Br, N, S, I

Question

I'm Really struggling in chemistry and this question has me stumped.

Answer 1

Anonymous,

Bonds are formed when an atom shares electrons with another atom. The number of bonds formed equals the number of electron pairs shared between the target atom and the surrounding ones. That's normally = the number of electrons needed to fill up the outer shell of the target (central) atom in the molecule. Except for H, which only forms 1 bond, just count over to the next noble gas element on the elements table. So respectively for O, F, C, Cl, Br, N, S, I, that's 2, 1, 4, 1, 1, 3, 2, 1.