The ModernEncyclopedia Est. 2026 · A living curriculum · Regularly updated
CHE-26 · Sciences · Fully written

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Atoms to synthesis

Chemistry is the science of matter and its transformations — how atoms combine, react and rearrange into everything from medicines to materials. It's often called the "central science," because it links the physics of atoms to the biology of life.

Learned well, it's less about memorising reactions than seeing why matter behaves as it does — energy, structure and change. Set your level below.

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CHE-26 · Chemistry
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§02

A map of Chemistry

Three classical branches, and beyond

The traditional divisions, plus the fields at the edges.

  • Physical chemistry — thermodynamics, reaction kinetics and quantum chemistry: the "why" beneath reactions.
  • Organic chemistry — the vast chemistry of carbon, and the art of synthesis.
  • Inorganic chemistry — the periodic table, metals and everything not carbon-based.
  • Analytical chemistry — measurement and spectroscopy: knowing what you actually have.
  • At the edges — biochemistry, medicinal and materials chemistry, and green chemistry.
§03

The canon

The chemists who made sense of matter

Real figures, real breakthroughs.

  • Antoine Lavoisier (1743–94) — the "father of modern chemistry": conservation of mass, and the end of alchemy.
  • John Dalton — modern atomic theory.
  • Dmitri Mendeleev — the periodic table (1869), which even predicted undiscovered elements.
  • Marie Curie — radioactivity and new elements.
  • Linus Pauling — The Nature of the Chemical Bond, and quantum ideas brought to chemistry.
  • Dorothy Hodgkin — X-ray crystallography of penicillin, insulin and vitamin B12.
  • Kekulé — the ring structure of benzene, famously imagined as a snake seizing its tail.
§04

The live debates

Questions chemistry keeps arguing

Fewer grand paradoxes than physics, but real debates all the same.

  • Is chemistry "just" physics? In principle reducible to quantum mechanics — but is there a genuinely chemical way of thinking that would be lost?
  • What is a chemical bond, really? A useful picture, or a real thing? The models get you far, then strain.
  • Green chemistry vs industrial reality. How fast the field can actually decarbonise its own processes.
  • The ethics of synthesis. The same skill makes life-saving drugs and dangerous compounds — the dual-use edge.
§05

Where to start

A route in

A route in — everything runs from the panel above.

  1. Run Orientation on atomic structure and the periodic table — the map the rest hangs on.
  2. Use the canon: understand why Mendeleev's table works, not just that it does.
  3. Drill reaction mechanisms with the Self-test, spaced out over days.
  4. Read a solid textbook, and let a visual source (like Periodic Videos) make the abstract concrete.

Always ask where the energy goes — that's usually the real explanation.