ATWT
| Date | Clue |
|---|---|
| 2023-07-22 | Periodic table no. |
| 2017-07-16 | 12.01, for carbon: Abbr. |
| 2017-01-22 | Fig. on a periodic table |
| 2016-09-27 | No. on a periodic table |
| 2014-07-06 | Periodic table abbr. |
| 2013-09-10 | No. in chemistry |
| 2013-02-24 | Silver's is 107.87: Abbr. |
| 2011-02-28 | No. on a periodic table |
| 2010-08-29 | Elementary figure: Abbr. |
| 2009-12-12 | Bit of elementary knowledge?: Abbr. |
| 2008-08-03 | Al's is almost 27 |
| 2008-04-02 | Periodic table no. |
| 2007-10-02 | 1, for hydrogen: Abbr. |
| 2007-02-14 | Periodic table abbr. |
| 2005-12-02 | No. for Na or Ni |
| 2004-04-04 | Periodic table abbr. |
| 2003-06-07 | Elementary abbr. |
| 2000-04-09 | No. on a certain table |