Question
This element’s hydrides are classified as “nido” or “arachno” by counting skeletal electron pairs in the Wade–Mingos rules. This element forms the anti-Markovnikov product when added across a double bond, and is then oxidized with hydrogen peroxide to form alcohols in a reaction named “hydro [this element].” The wurtzite form of this element’s nitride is harder than diamond. A canonical Lewis acid is this element’s trifluoride, which is planar since this element violates the octet rule and only has three valence electrons. For 10 points, what metalloid is located above aluminum on the periodic table and has atomic number five? ■END■
ANSWER: boron [or B; accept hydroboration]
<Chemistry>
= Average correct buzz position
Summary
| 2024 ACF Fall at Cornell | fall | Y | 9 | 89% | 0% | 22% | 76.00 |
| 2024 ACF Fall at Ohio State | fall | Y | 8 | 100% | 0% | 25% | 51.88 |
| 2024 ACF Fall at Washington | fall | Y | 6 | 100% | 0% | 50% | 78.00 |
| 2024 ACF Fall at Georgia | fall | Y | 11 | 100% | 0% | 27% | 71.82 |
| 2024 ACF Fall at North Carolina | fall | Y | 9 | 100% | 0% | 22% | 72.11 |
| 2024 ACF Fall at Claremont Colleges | fall | Y | 5 | 100% | 0% | 20% | 48.20 |
| 2024 ACF Fall at Rutgers | fall | Y | 8 | 100% | 0% | 0% | 57.75 |
| 2024 ACF Fall at Illinois | fall | Y | 9 | 100% | 0% | 44% | 54.00 |
Buzzes
| Player | Team | Opponent | Buzz Position | Value |
|---|---|---|---|---|
| Alec Riso | Cornell D | Cornell C | 7 | 10 |
| Jason Thieu (DII) | Michigan State A | Miami C (DII) | 8 | 10 |
| Karthik Krishnamurthy (DII) | USC | UCLA B | 8 | 10 |
| Benny Feldman | Chicago A | Illinois C | 8 | 10 |
| Will Hughes | Auburn A | Emory A | 11 | 10 |
| Yuki Brown (DII) | Miami B (UG) | Jefferson County Scholars (DII) | 13 | 10 |
| Lucas Shedlock (UG) | Princeton A (UG) | Lehigh A (UG) | 17 | 10 |
| Michael Eng | UNC D | UNC C | 19 | 10 |
| Nick Machin (UG) | UCLA A | Claremont C | 22 | 10 |
| Sriram Koritala | Illinois A | Notre Dame A | 22 | 10 |
| Ishaan Singh | Purdue B | Northwestern A | 22 | 10 |
| Euan McCubbin | UW Chastity | Arizona State A | 23 | 10 |
| Matthew Westley | Purdue A | SIUE | 23 | 10 |
| Kenny Shaffer (UG) | Ohio State A (UG) | West Virginia B (UG) | 29 | 10 |
| Cameron Wiliams | Appalachian State A | Liberty B | 33 | -5 |
| Kennedy Gallaher | Notre Dame B | Northwestern B | 35 | -5 |
| Ilyas Choukri | Virginia Tech A | William & Mary | 39 | 10 |
| Xavier Bomhorst (DII) | Maryland A (DII) | Penn B (DII) | 45 | 10 |
| Matthew Kelley (DII) | Michigan D (UG) | Michigan B (UG) | 46 | 10 |
| Tianyu Xu | Georgia Tech A | Mississippi State A | 46 | 10 |
| Ayush Patel (DII) | UCLA C | UCSD | 46 | -5 |
| Rohan Krishnamoorthi | WashU A | Iowa A | 46 | 10 |
| Rachel Fanous (DII) | Michigan A (UG) | CWRU C (UG) | 47 | -5 |
| Alan Lee (UG) | CWRU A (UG) | Ohio State B (DII) | 47 | -5 |
| Alex Hestermann | UW Pride | UW Lust | 47 | -5 |
| Rohit Chintala (DII) | Maryland B (DII) | NYU B | 47 | 10 |
| Mary Wells | VCU | Liberty A | 53 | -5 |
| Alex Wong (DII) | Rutgers A (UG) | Fordham A | 53 | 10 |
| Vedh Ramesh (DII) | Penn A (DII) | NYU A (UG) | 55 | 10 |
| Aksel Malatak | Syracuse | RIT B | 57 | -5 |
| Quinn Vaughen | RIT B | Syracuse | 58 | 10 |
| Owen McCoy | Illinois D | Purdue C | 59 | -5 |
| Chris Steinbronn | UW Gluttony | UBC A | 60 | -5 |
| Ayan Guha | Georgia Tech D | Southern | 60 | -5 |
| Malachi Ledford | Tusculum | Duke A | 60 | 10 |
| Allen Xu | Georgia Tech E | Auburn C | 61 | 10 |
| Ethan Tran (DII) | UCLA E | Claremont B | 63 | 10 |
| Evan Davies (UG) | Miami A (UG) | Ohio State C (DII) | 64 | 10 |
| Jack Stuhlman (DII) | Lehigh B (DII) | Rowan A (DII) | 64 | 10 |
| Azura Gollamudi | Northwestern B | Notre Dame B | 65 | 10 |
| Ethan Ma | Illinois B | WashU B | 65 | -5 |
| Jonathan Zhang | Cornell F | ESF | 68 | -5 |
| Darrien Liang | UW Wrath | Arizona State B | 68 | 10 |
| Anne Fjeld | Alberta | UW Envy | 68 | -5 |
| Monish Jampala | Georgia Tech B | Georgia A | 68 | 10 |
| Aidan Jones | Liberty A | VCU | 68 | 10 |
| Jesse Mindle | NC State | James Madison B | 68 | 10 |
| Fish Tsai (DII) | UCSD | UCLA C | 71 | 10 |
| Parker McCoig | Tennessee A | South Carolina B | 72 | 10 |
| Parker McCoig | Tennessee A | South Carolina B | 72 | 10 |
| Pratham Banushali (DII) | West Virginia A (UG) | Michigan C | 74 | 10 |
| Ishan Pachauri (DII) | UCLA D | Claremont A | 77 | 10 |
| Matthew Wang | UBC B | UW Greed | 78 | 10 |
| Abby Helmueller | Clemson A | Furman | 79 | -5 |
| Nathan Whittington | Tennessee B | South Carolina A | 80 | 10 |
| Nathan Whittington | Tennessee B | South Carolina A | 80 | 10 |
| Anna Kuang | Cornell E | Binghamton A | 81 | 10 |
| Gianna Pettine | U of Rochester B | RIT C | 81 | 10 |
| Sam Hicks-Jirkans (DII) | Ohio State B (DII) | CWRU A (UG) | 81 | 10 |
| Sambodh Sinha | Vanderbilt B | Alabama A | 81 | -5 |
| Alex Lin (DII) | Rutgers B | Bard A (UG) | 81 | 10 |
| Owen Ashbrook | Iowa B | Notre Dame C | 81 | -5 |
| Nayel Tekle | Cornell B | Cornell A | 85 | 10 |
| Carly Hemani | James Madison A | UNC A | 96 | 10 |
| Gregory Stone | ESF | Cornell F | 97 | 10 |
| Skylar Robinson | Cornell G | RIT A | 99 | 10 |
| Gavin Morrow | UW Envy | Alberta | 99 | 10 |
| Alexandra Knight | Liberty C | Appalachian State B | 99 | 10 |
| Victor Bender | Penn State | U of Rochester A | 100 | 0 |
| Aidan Keenan | U of Rochester A | Penn State | 100 | 0 |
| Elijah O'Sick Johnson | Binghamton C | Binghamton B | 100 | 10 |
| Angelo Pan (UG) | CWRU C (UG) | Michigan A (UG) | 100 | 10 |
| Joyann Hua | UBC A | UW Gluttony | 100 | 10 |
| Akshath Srinivasan | UW Lust | UW Pride | 100 | 10 |
| Akajiugo Amucheazi | Southern | Georgia Tech D | 100 | 10 |
| Thomas Hydorn | Furman | Clemson A | 100 | 10 |
| Dylan Missal | Alabama A | Vanderbilt B | 100 | 10 |
| Nick Smemoe | UNC B | Virginia | 100 | 10 |
| Jonathan Bost | Liberty B | Appalachian State A | 100 | 10 |
| Jason Qin (DII) | Columbia J (DII) | Columbia B | 100 | 10 |
| Sam Hewitt | WashU B | Illinois B | 100 | 10 |
| Molly Mendenhall | Notre Dame C | Iowa B | 100 | 10 |
| David Thomas | Purdue C | Illinois D | 100 | 10 |