Chem Help plz, Strong hydrogen bonds can occur between which pairs of elements: O, N, H, C, F? Help PLZ!?

Question

Strong hydrogen bonds can occur between which pairs of elements?
I) O and N
II) H and N
III) H and O
IV) H and C
V) H and F

1. I, II, III, IV and V
2. II and III only
3. I, III and V only
4. II, III, IV and V only
5. II, III and V only

Answer 1

II, III, and V.

O and H, N and H, and F and H are the ONLY combinations that produce H-Bonds. This is due to their high electronegativities. Cl, has the same electronegavity as O (3.5), but its too big to produce an H-Bond.

Answer 2

No, that isn't any longer in basic terms H and O. It occurs between fairly electronegative atoms and hydrogen; specifically O, N, and F. C less than particular situations hydrogen bonds. different fairly EN atoms, like Cl, do not oftentimes hydrogen bond because they are too large.

Answer 3

Hydrogen bons occur between H and elements that have a small radius and are highly electronegative

F O and N the "FON sisters"

or hydrogen bonding is No FON

Answer 4

Is this a homework problem, shouldn't you look it up in the text to really learn something?