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  2. AP Chemistry - Wikipedia

    en.wikipedia.org/wiki/AP_Chemistry

    The 2014 AP Chemistry exam was the first administration of a redesigned test as a result of a redesigning of the AP Chemistry course. The exam format is now different from the previous years, with 60 multiple choice questions (now with only four answer choices per question), 3 long free response questions, and 4 short free response questions.

  3. AP World History: Modern - Wikipedia

    en.wikipedia.org/wiki/AP_World_History:_Modern

    Chemistry; Chinese Language and Culture ... as some take it in senior and freshman year. ... Period 2 – c. 1450 to c. 1750; Unit 3: Land-Based Empires Unit 4 ...

  4. Methylene (compound) - Wikipedia

    en.wikipedia.org/wiki/Methylene_(compound)

    2] 2• (X̃ 3 B 1) + H 2 O → [CH 3] • + [HO] • [CH 2] (ã 1 A 1) + H 2 O → H 2 CO + H 2 or H 3 COH. The singlet state is also more stereospecific than the triplet. [10] Methylene spontaneously autopolymerises to form various excited oligomers, the simplest of which, is the excited form of the alkene ethylene. The excited oligomers ...

  5. George W. Chang - Wikipedia

    en.wikipedia.org/wiki/George_W._Chang

    [2] Chang has taught a seminar class in the past titled "The Freshman Experience". In the seminar, students pick discussion topics, interview fellow students and share their "research" findings in the class on topics ranging from dating and homework to gaining the Freshman 15 and trying to avoid parking tickets. He has also taught Nutritional ...

  6. Outline of chemistry - Wikipedia

    en.wikipedia.org/wiki/Outline_of_chemistry

    The following outline acts as an overview of and topical guide to chemistry: . Chemistry is the science of atomic matter (matter that is composed of chemical elements), especially its chemical reactions, but also including its properties, structure, composition, behavior, and changes as they relate to the chemical reactions.

  7. History of chemistry - Wikipedia

    en.wikipedia.org/wiki/History_of_chemistry

    The protoscience of chemistry, and alchemy, was unsuccessful in explaining the nature of matter and its transformations. However, by performing experiments and recording the results, alchemists set the stage for modern chemistry. The history of chemistry is intertwined with the history of thermodynamics, especially through the work of Willard ...

  8. HOMO and LUMO - Wikipedia

    en.wikipedia.org/wiki/HOMO_and_LUMO

    Each circle represents an electron in an orbital; when light of a high enough frequency is absorbed by an electron in the HOMO, it jumps to the LUMO. 3D model of the highest occupied molecular orbital in CO 2 3D model of the lowest unoccupied molecular orbital in CO 2. In chemistry, HOMO and LUMO are types of molecular orbitals.

  9. General chemistry - Wikipedia

    en.wikipedia.org/wiki/General_chemistry

    General chemistry (sometimes referred to as "gen chem") is offered by colleges and universities as an introductory level chemistry course usually taken by students during their first year. [1] The course is usually run with a concurrent lab section that gives students an opportunity to experience a laboratory environment and carry out ...

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