| Title | Terms | Created |
|---|---|---|
| Abundance of Chemical Elements in Earthes's Crust (%) | 9 | September 22, 2008 |
| first 30 elements valence | 30 | September 22, 2008 |
| first 30 elements electron config | 30 | September 22, 2008 |
| First 30 elements, number | 30 | September 22, 2008 |
| Subject | User's Sets |
|---|---|
| crystal chemistry | 4 |
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| Days of membership | 430 |