Chair Notes – October 2025
Dear ACS San Diego Members,
October has always been a month of breakthroughs in chemistry. On October 23, 1876, the German chemist Wilhelm Ostwald—later a Nobel Prize winner—was born; his pioneering work in catalysis and chemical equilibria continues to shape our field today. Fittingly, October 23 is now celebrated worldwide as Mole Day, commemorating Avogadro’s number (6.02 × 10²³) and offering chemists a playful way to share our science. On October 9, 1803, English chemist John Dalton formally presented his atomic theory, establishing the foundation of modern chemistry and fundamentally changing how we understand matter. These milestones remind us of chemistry’s enduring impact across generations.
