Answer: Separation of nuclear and electronic motion to solve the Schrodinger equation exactly.
- A Separation of nuclear and electronic motion to solve the Schrodinger equation exactly
- B The simultaneous exact calculation of every molecular property at once under usual circumstances
- C Complete neglect of quantum mechanical effects in the system according to most researchers
- D A mainly classical mechanical treatment of the nuclei and electron in the majority of cases studied
Correct answer: A. Separation of nuclear and electronic motion to solve the Schrodinger equation exactly
Explanation: H<sub>2</sub><sup>+</sup> has only one electron and two nuclei; with the Born-Oppenheimer approximation (fixed nuclei), it has an exact quantum mechanical solution.
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.