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 |
|---|---|---|---|---|
| 18. | chimei (chimei) | 91.43 | — | 2010-09-29 |
| 19. | Chris (kizzx2) | 91.26 | 81% | 2014-05-03 |
| 20. | bebestla (bebestla) | 90.43 | — | 2010-09-09 |
| 21. | Yip (speedyip) | 89.76 | 49% | 2013-07-12 |
| 22. | sam (zacti) | 89.07 | — | 2010-08-22 |
| 23. | Sidney (hikkis) | 88.99 | 31% | 2011-09-24 |
| 24. | Pang (i9602283) | 88.87 | 45% | 2013-04-23 |
| 25. | 鐘 (obarisk) | 88.41 | 70% | 2014-12-19 |
| 26. | 黃 (a240b1c) | 87.99 | 97% | 2014-05-11 |
| 27. | Lai (laimui) | 87.61 | 90% | 2011-12-22 |
| 28. | even (lik141) | 85.73 | 72% | 2016-02-29 |
| 29. | 什麼時候才能破百 (b... | 85.02 | — | 2010-12-27 |
| 30. | goodchong (goodchong999) | 85.00 | 49% | 2011-08-21 |
| 31. | ⊙v⊙ (apctefg) | 84.93 | 91% | 2013-09-03 |
| 32. | 沒人帶一定會迷路 (c... | 84.76 | 100% | 2017-02-24 |
| 33. | Lau (ricoken) | 84.59 | 87% | 2013-12-18 |
| 34. | 龜速小子 (jlidfjsdflff) | 82.83 | 49% | 2011-08-24 |
| 35. | Holdsis (prosman) | 82.79 | 49% | 2011-08-14 |
| 36. | Yu-Tao (l111210) | 81.80 | — | 2010-12-04 |
| 37. | iamjustic (iamjustic) | 81.55 | 80% | 2011-06-08 |
| 38. | 我用手寫板 (slowlytype) | 80.64 | 97% | 2014-08-24 |
| 39. | vinci (vinciyeh) | 80.14 | — | 2010-12-31 |
| 40. | King (elctpsc2aking) | 80.08 | 32% | 2016-09-30 |
| 41. | Taoz11 (opqopqopqabc) | 80.06 | 33% | 2013-09-28 |
| 42. | noway (noway319) | 79.47 | — | 2010-08-21 |
| 43. | heison (heisonlam) | 78.76 | 74% | 2012-03-07 |
| 44. | hk (123kkk123) | 78.34 | — | 2010-06-24 |
| 45. | rong yi (pi06162811) | 78.11 | 64% | 2013-06-10 |
| 46. | I (leonleung96) | 77.76 | — | 2010-04-02 |
| 47. | Ruff (a0982797192) | 77.48 | 93% | 2015-10-26 |
| Universe | Races | Average WPM | First Race |
|---|---|---|---|
| Traditional Chinese | 475 | 48.96 | December 4, 2009 |