Round 600: Tossup 11
The study of the deltahedral structures of this element’s hydride clusters motivated the development of polyhedral skeletal electron pair theory. Two banana-shaped bonds appear in a compound consisting of two atoms of this element and six hydrogen atoms; those bonds are three-center two-electron bonds. The hexagonal form of this element’s nitride has a structure analogous to graphene. With the halogens, this element forms trigonal planar compounds that are considered “electron-deficient,” such as a trifluoride that violates the octet rule. For 10 points, name this lightest metalloid element with atomic number five, symbolized B. ■END■
ANSWER: boron [accept B until read] (The compound in the second line is diborane.)
<UBC A, Chemistry> | Packet A
= Average correct buzz position
Buzzes
| Player | Team | Opponent | Position | Value |
|---|---|---|---|---|
| Matthew Kohn | Williams A | Tufts A | 74 | 10 |
| Nikhil Nair | Boston University B | Southern Connecticut State University A | 90 | 10 |
Summary
| Tournament | Edition | TUH | Conv. % | Neg % | Average Buzz |
|---|---|---|---|---|---|
| UK (North) | UK | 5 | 100% | 40% | 91.80 |
| UK (South) | UK | 8 | 100% | 25% | 82.88 |
| Northern California | US | 4 | 100% | 0% | 46.00 |
| Southern California | US | 7 | 100% | 29% | 71.57 |
| Eastern Canada (1) | US | 4 | 100% | 0% | 55.00 |
| Florida | US | 4 | 100% | 75% | 92.25 |
| Great Lakes | US | 10 | 100% | 20% | 74.50 |
| Lower Mid-Atlantic | US | 9 | 100% | 11% | 75.44 |
| Upper Mid-Atlantic | US | 11 | 91% | 18% | 70.50 |
| Upper Mid-Atlantic | US | 1 | 100% | 0% | 26.00 |
| Midwest | US | 9 | 100% | 22% | 74.00 |
| North | US | 4 | 100% | 0% | 79.00 |
| Northeast | US | 2 | 100% | 0% | 82.00 |
| Pacific | US | 8 | 100% | 13% | 86.75 |
| South Central | US | 6 | 100% | 0% | 64.00 |
| Southeast | US | 12 | 100% | 33% | 76.58 |
| Upstate NY | US | 5 | 80% | 20% | 82.00 |