在化學元素是由方式的電子被安排在原子。這種安排是根據現代週期分類元素：週期表。
—from Structure and Bonding (Basic Concepts in Chemistry) (結構和成鍵（基本概念，化學）), a book by Jack Barrett
Active since December 4, 2009.
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| Rank | Username | WPM | Accuracy | Date |
|---|---|---|---|---|
| 267. | cheng (yan820) | 28.51 | — | 2010-07-19 |
| 268. | yuni (yunichan) | 28.36 | 48% | 2014-06-30 |
| 269. | CHRIS (s60103) | 27.73 | — | 2010-12-07 |
| 270. | soho (zzzssshk) | 27.62 | 71% | 2014-05-10 |
| 271. | wai (leeszewai) | 27.53 | — | 2010-07-30 |
| 272. | N (greatkit) | 27.41 | 18% | 2016-08-25 |
| 273. | sholdman (sholdman) | 27.11 | 20% | 2015-08-13 |
| 274. | melody (melody728) | 26.81 | 95% | 2011-06-10 |
| 275. | Martin (martinkuok) | 26.63 | 49% | 2013-03-10 |
| 276. | pico (picowei) | 26.37 | — | 2010-04-18 |
| 277. | Yan (foolishman) | 26.07 | 42% | 2011-06-25 |
| 278. | kene Li (kene_lyk) | 25.95 | — | 2010-02-26 |
| 279. | Billy (icb003) | 25.91 | 51% | 2012-10-24 |
| 280. | Anastasia (wellwell) | 25.53 | 95% | 2015-09-26 |
| 281. | Iris (irism) | 25.38 | 35% | 2012-10-10 |
| 282. | tom (ff002) | 25.31 | 95% | 2012-03-28 |
| 283. | lorraine (lorrainew) | 25.23 | 86% | 2011-06-20 |
| 284. | iskei (iskeicheng) | 25.09 | 42% | 2013-02-08 |
| 285. | Tong (akttong) | 24.94 | 43% | 2011-05-09 |
| 286. | Jane (bbsslopon) | 24.82 | 47% | 2015-08-31 |
| 287. | Kit (kitleelee) | 23.84 | 68% | 2018-06-19 |
| 288. | Liu (jackliu2011) | 23.47 | 68% | 2011-11-05 |
| 289. | ng (cell_cell) | 23.30 | 36% | 2013-05-09 |
| 290. | 尻 (std14789) | 23.29 | 95% | 2015-12-25 |
| 291. | cyril (cyril200x) | 23.28 | 41% | 2012-09-14 |
| 292. | Coco (fanfan_) | 23.07 | — | 2010-11-21 |
| 293. | sa (sabowni) | 22.96 | — | 2010-08-17 |
| 294. | Milan (maggiemaggie) | 22.21 | 49% | 2013-01-12 |
| 295. | Rainy (rainyh) | 21.87 | 43% | 2013-01-21 |
| 296. | Lo (ballball0718) | 21.64 | — | 2010-12-04 |
| Universe | Races | Average WPM | First Race |
|---|---|---|---|
| Traditional Chinese | 475 | 48.96 | December 4, 2009 |