Answer: Extensive hydrogen bonding.
- A Extensive hydrogen bonding
- B High atomic mass
- C Ionic character
- D Large molecular size
Correct answer: A. Extensive hydrogen bonding
Explanation: Water molecules form strong intermolecular hydrogen bonds, requiring extra energy to vaporise.
Each water molecule's O-H bonds (covalent, solid) can hydrogen-bond (dashed) to neighbouring molecules, forming an extended network responsible for water's unusually high boiling point and density anomaly.
Concept context
The simplest and most abundant element in the universe. Study its unique position in the periodic table, isotopes (protium, deuterium, tritium), properties of water and hydrogen peroxide, and industrial uses.