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  2. List of unsolved problems in chemistry - Wikipedia

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

    This article or section possibly contains synthesis of material that does not verifiably mention or relate to the main topic. Relevant discussion may be found on the talk page . ( June 2021 ) ( Learn how and when to remove this message )

  3. 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.

  4. 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

  5. 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 ...

  6. 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]

  7. 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 ...