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  2. List of unsolved problems in chemistry - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    Which "classic organic chemistry" reactions admit chiral catalysts? Is it possible to construct a quaternary carbon atom with arbitrary (distinguishable) substituents and stereochemistry? Can artificial enzymes replace the need for protecting groups when modifying sensitive compounds? [8]

  3. Lists of unsolved problems - Wikipedia

    en.wikipedia.org/wiki/Lists_of_unsolved_problems

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Help; Learn to edit; Community portal; Recent changes; Upload file

  4. List of Cambridge International Examinations Advanced Level ...

    en.wikipedia.org/wiki/List_of_Cambridge...

    AS Level only CIE 8291: Environmental Management: AS Level only CIE 8436: Thinking Skills: AS Level only; expired in 2007 CIE 8660: Research Project: AS Level only CIE 8663: Music: AS Level only CIE 8664: Portuguese: expired in 2006 CIE 8665: Spanish – First Language: AS Level only CIE 8666: Physical Education: AS Level only CIE 8667 ...

  5. List of Advanced Level subjects - Wikipedia

    en.wikipedia.org/wiki/List_of_Advanced_Level...

    This page was last edited on 3 December 2023, at 01:55 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.

  6. Quantum mechanics - Wikipedia

    en.wikipedia.org/wiki/Quantum_mechanics

    This is one of the most difficult aspects of quantum systems to understand. It was the central topic in the famous Bohr–Einstein debates, in which the two scientists attempted to clarify these fundamental principles by way of thought experiments. In the decades after the formulation of quantum mechanics, the question of what constitutes a ...

  7. A-level - Wikipedia

    en.wikipedia.org/wiki/A-level

    The A-level (Advanced Level) is a subject-based qualification conferred as part of the General Certificate of Education, as well as a school leaving qualification offered by the educational bodies in the United Kingdom and the educational authorities of British Crown dependencies to students completing secondary or pre-university education. [1]

  8. Portal:Chemistry/Major topics - Wikipedia

    en.wikipedia.org/wiki/Portal:Chemistry/Major_topics

    Analytical chemistry • Biochemistry • Chemical biology • Chemistry education • Computational chemistry • Electrochemistry • Environmental chemistry • Green chemistry • Inorganic chemistry • Materials science • Medicinal chemistry • Nuclear chemistry • Organic chemistry • Organometallic chemistry • Pharmacy ...

  9. Portal:Chemistry - Wikipedia

    en.wikipedia.org/wiki/Portal:Chemistry

    Chemistry is the scientific study of the properties and behavior of matter.It is a physical science within the natural sciences that studies the chemical elements that make up matter and compounds made of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during reactions with other substances.