Join host Jack for a solo deep-dive into the history and modern significance of the periodic table. This episode traces the path from early pattern-seeking experiments—Döbereiner’s triads, Chancourtois’s telluric helix and Newlands’s law of octaves—through Dmitri Mendeleev’s revolutionary table and his bold predictions for undiscovered elements.

Jack explores the human side of discovery: Mendeleev’s obsession and famous dream, the rivalry with Lothar Meyer, and the national pride and politics that shaped scientific credit. The episode also tells the tragic story of Henry Moseley, whose discovery of the atomic number solved long-standing anomalies and whose death in World War I cut short a brilliant career.

Moving to modern chemistry, the episode covers how Moseley’s work led to the table we use today, the creation and detection of superheavy elements, disputes over naming rights, and the hunt for the ‘‘island of stability.’

Listeners will learn why the periodic table is more than a classroom chart: how it predicts chemical behavior, underpins technologies like semiconductors and medical isotopes, and reveals cosmic processes—stellar nucleosynthesis and the origins of heavy elements in supernovae and neutron-star collisions.

Key takeaways include the table’s predictive power, the interplay of observation and theory, and how personal ambition and international rivalry shaped scientific progress. The episode closes by reflecting on the periodic table as a symbol of human curiosity and as an evolving tool that still guides discovery.

Hosted by Jack (solo episode, no external guests). Up next: a preview of the next episode on the history and cultural impact of Dungeons & Dragons.