All Writings

Thermodynamics tells us whether a reaction can occur; chemical kinetics tells us whether it will occur within the lifetime of the universe....

Why do some chemical reactions proceed spontaneously with explosive vigor, while others refuse to occur without continuous energy input? Between 1873 and...

In February 1869 in Saint Petersburg, Dmitri Ivanovich Mendeleev arranged the known chemical elements by atomic weight and chemical valence, unveiling the...

For half a century, chemistry was paralyzed by confusion between atoms and molecules. In 1811, Amedeo Avogadro resolved the paradox of combining...

Democritus dreamed of atoms as philosophical corpuscles; John Dalton gave them measurable atomic weights. In 1803–1808, the Manchester Quaker schoolmaster deduced the...

In the 1770s and 1780s, Antoine-Laurent de Lavoisier and his brilliant collaborator Marie-Anne Paulze revolutionized chemistry. Armed with precision balances, Lavoisier demolished...

For centuries, air was considered a single indivisible element. In the mid-eighteenth century, pneumatic chemists like Joseph Black, Henry Cavendish, and Joseph...

In 1661, Robert Boyle published The Sceptical Chymist, shattering both the Aristotelian four elements and the Paracelsian tria prima. Demanding rigorous quantitative...

In eighth-century Abbasid Baghdad, Islamic alchemy transformed speculative elemental philosophy into an empirical laboratory craft. Jabir ibn Hayyan (Geber) invented the alembic,...

Long before the rise of modern laboratories, pre-Socratic philosophers grappled with a radical question: what is the fundamental substrate of all physical...