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  2. Chemistry - Wikipedia

    en.wikipedia.org/wiki/Chemistry

    Chemistry is the scientific study of the properties and behavior of matter. [1] 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.

  3. Glossary of chemistry terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_chemistry_terms

    Also acid ionization constant or acidity constant. A quantitative measure of the strength of an acid in solution expressed as an equilibrium constant for a chemical dissociation reaction in the context of acid-base reactions. It is often given as its base-10 cologarithm, p K a. acid–base extraction A chemical reaction in which chemical species are separated from other acids and bases. acid ...

  4. Ninth grade - Wikipedia

    en.wikipedia.org/wiki/Ninth_grade

    Grade 9 subjects include Danish, English, Christian studies, history, social studies, mathematics, geography, biology, physics/chemistry and German and French as electives. [11] Students must sit compulsory school-leaving exams at the end of grade 9, and must also complete a mandatory project assignment during the year. [11] After grade 9 ...

  5. Bayview Secondary School - Wikipedia

    en.wikipedia.org/wiki/Bayview_Secondary_School

    Bayview Secondary School, initially known as Bayview High School is a grade 9–12, 2-semester secondary school operated by the York Region District School Board. It is located just north of the northeast corner of Bayview Avenue and Major Mackenzie Drive in Richmond Hill, Ontario, Canada. [2] Bayview S.S. was officially opened on March 19, 1961.

  6. Fluxional molecule - Wikipedia

    en.wikipedia.org/wiki/Fluxional_molecule

    In chemistry and molecular physics, fluxional (or non-rigid) molecules are molecules that undergo dynamics such that some or all of their atoms interchange between symmetry-equivalent positions. [1] Because virtually all molecules are fluxional in some respects, e.g. bond rotations in most organic compounds , the term fluxional depends on the ...

  7. US FDA proposes standardized testing to detect asbestos in ...

    www.aol.com/us-fda-proposes-standardized-testing...

    Asbestos, a known human carcinogen, can be injurious to consumers if found in talc-containing cosmetic products as there is no established "safe level" threshold for exposure to the substance. If ...

  8. This Body Type Is Linked to an Increased Risk of Developing ...

    www.aol.com/lifestyle/body-type-linked-increased...

    A new study has linked visceral fat around the midsection with an increased risk of developing Alzheimer’s disease

  9. 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.