Packet 13: Bonus 18
For 10 points each, answer the following about Lanthanides:
[10e] Lanthanides are the first row of the block on the periodic table named for this letter. There are seven orbitals in the subshell named for this letter, which comes after s, p, and d..
ANSWER: f [accept f orbital or f block or f subshell]
[10h] Prior to the development of this technique, separation of the different lanthanides was so difficult that they were thought to be the same element. Elution of protein purified by this technique is conducted by increasing the concentration of salt.
ANSWER: Ion-exchange chromatography [accept ion chromatography, prompt on chromatography]
[10m] The lanthanide contraction is an apparent decrease in this quantity due to poor shielding from inner 4f electrons. For hydrogen, this quantity is about 0.53 angstroms.
ANSWER: atomic radius [accept atomic size]
<Science - Chemistry, Jonathan Ouyang> | VAULT II Packet 13 (Finals 1)
| Heard | PPB | E % | M % | H % |
|---|---|---|---|---|
| 5 | 20.00 | 100% | 100% | 0% |
Conversion
| Team | Opponent | Part 1 | Part 2 | Part 3 | Total | Parts |
|---|---|---|---|---|---|---|
| Midnight Bus to Vista | Leif Eriksen's Striking Appearance | 10 | 0 | 10 | 20 | EM |
Summary
| Tournament | Edition | Match | Heard | PPB | E % | M % | H % |
|---|---|---|---|---|---|---|---|
| VAULT II at UCSB | 2026-03-13 | ✓ | 1 | 20.00 | 100% | 100% | 0% |
| VAULT II Northern UK | 2026-04-24 | ✓ | 1 | 20.00 | 100% | 100% | 0% |
| VAULT II at Harvard | 2026-04-30 | ✓ | 2 | 20.00 | 100% | 100% | 0% |
| VAULT II Stanford Online | 2026-07-17 | ✓ | 1 | 20.00 | 100% | 100% | 0% |