1. Rank the following from low to high electronegativity : Phosphorus, Iodine, hydrogen, bromine, carbon, chlorine, oxygen, sulfur, flourine, nitrogen

2. What is the most polar and least polar bond within each set of bonds? A) C-F, O-F, Be-F. B) Be-Cl, Br-Cl, C-Cl C) C-Cl, C-O, C-H

3. Indicate how many covalent bonds each of the following elements tend to form? Hydrogen, Oxygen, nitrogen, sulfur, flourine, helium, chlorine, bromine, neon