Valence level
3. Which of the following are also compounds? Select all that apply.
A. CI
B. H2O
C. CuFeS2
D. KCI
E. Mg

Which of the following is not a characteristic of a hydrogen bond? 1. it is responsible for the unusual physical properties of water. 2. it is weaker than a covalent bond. 3. it is stronger than other dipole-dipole interactions. 4. it can occur when hydrogen is covalently bound to very electronegative elements liks f, cl, br and i.