Question
These orbitals and p orbitals have the smallest shifts from spin–orbit coupling because they have the least values of orbital angular momentum. For 10 points each:
[10e] Name these spherical atomic orbitals with angular momentum quantum number l-equals-zero.
ANSWER: s orbitals
[10m] The Lamb shift in the energy gap between 2s and 2p orbitals is due to fluctuations in this thing. Pair production causes "polarization" of this thing.
ANSWER: vacuum [accept QED vacuum]
[10h] In degenerate perturbation theory, this effect causes the separation of "mixed" states that are linear combinations of 2s and 2p orbitals. This effect is the splitting of spectral lines due to an external electric field.
ANSWER: Stark effect
<Science - Physics>
Data
| Team | Opponent | Part 1 | Part 2 | Part 3 | Total |
|---|---|---|---|---|---|
| Adlai E. Stevenson B | Yukon A | 10 | 0 | 0 | 10 |
| Carmel A | Northside College Prep | 10 | 0 | 10 | 20 |
| Fremd | Northmont | 10 | 0 | 0 | 10 |
| Georgetown Day | Irvington | 10 | 0 | 0 | 10 |
| Grosse Pointe South | Downingtown STEM | 10 | 0 | 0 | 10 |
| Montgomery Blair B | Hunter B | 10 | 0 | 10 | 20 |
| Uni School of Nashville A | Uni of Illinois Laboratory | 10 | 0 | 0 | 10 |
Summary
| Tournament | Edition | Exact Match? | Heard | PPB | Easy % | Medium % | Hard % |
|---|---|---|---|---|---|---|---|
| 2025 PACE NSC | 06/07/2025 | Y | 7 | 12.86 | 100% | 0% | 29% |