Chemists and Scientists

Empedocles

four elements (earth, water, air, and fire)

Democritus

atomism (the theory that all matter is made up of tiny, indivisible particles called atoms)

Kanāda (Kanada)

early atomic ideas (ancient Indian philosophical concepts proposing that matter consists of indivisible particles called anu)

Jabir ibn Hayyan (Geber)

experimental alchemy and laboratory methods (pioneered systematic laboratory experimentation, distillation, and crystallization)

Paracelsus

chemical medicine (pioneered iatrochemistry, applying chemical principles and minerals to pharmacology and medicine)

Marie Curie

radioactivity and new elements (discovered polonium and radium and advanced the study of radioactive decay)

Pierre Curie

piezoelectricity and radioactivity research (discovered piezoelectricity and made foundational contributions to magnetism and radioactivity)

Ernest Rutherford

atomic nucleus and nuclear physics (discovered the atomic nucleus through the gold foil experiment and established the planetary model of the atom)

Linus Pauling

chemical bonding and molecular structure (pioneered the application of quantum mechanics to chemistry and described the nature of chemical bonds)

Amedeo Avogadro

molecules and gas relationships (formulated Avogadro's law, stating that equal volumes of gases at the same temperature and pressure contain equal numbers of molecules)

Friedrich Wöhler

synthetic organic chemistry (synthesized urea from inorganic starting materials, disproving the vitalism theory)

Justus von Liebig

agricultural and organic chemistry (made foundational contributions to agricultural chemistry, soil nutrition, and the organization of organic analysis)

Louis Pasteur

stereochemistry, fermentation, and microbiology (discovered chiral molecules, pasteurization, and the germ theory of disease)

Henri Becquerel

discovery of natural radioactivity (discovered radioactivity accidentally while investigating uranium salts)

Robert Boyle

experimental chemistry and gas laws (formulated Boyle's law and established rigorous experimental methods in chemistry)

Antoine-Laurent de Lavoisier

conservation of mass and modern chemical nomenclature (established the law of conservation of mass, disproved the phlogiston theory, and modernized chemical naming conventions)

John Dalton

modern atomic theory (proposed the first scientific atomic theory, stating that elements combine in fixed ratios and atoms have characteristic weights)

Jöns Jacob Berzelius

chemical symbols and atomic weights (introduced modern chemical notation symbols and determined accurate atomic weights for numerous elements)

Humphry Davy

electrochemistry and element discovery (isolated several reactive alkali and alkaline earth metals using electrolysis and invented the miner's safety lamp)