The chemistry of an element is determined by the manner in which its electrons are arranged in the atom. Such arrangements are the basis of the modern periodic classification of the elements: the Periodic Table.
| Game | Time | WPM | Accuracy |
|---|---|---|---|
| 217 | 2012-08-13 04:57:53 | 46.40 | 90% |
| 180 | 2012-07-20 09:26:39 | 43.27 | 90% |