Historical clue formulations

• Party — 2025-04-11
• One of 18 on the periodic table — 2024-12-06
• Any set of elements in a column on the periodic table — 2021-07-18
• Word after focus or Facebook — 2021-03-28
• With 28-Down, multisubject photos ... or a hint to the answers to the four starred clues — 2019-04-30
• Put into categories — 2018-12-18
• Congregation — 2010-05-26
• It has dynamics — 2002-10-19
• Family — 2002-04-21
• Throng — 1999-03-14
• Get together — 1997-08-28