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  2. Block (periodic table) - Wikipedia

    en.wikipedia.org/wiki/Block_(periodic_table)

    The s-block, with the s standing for "sharp" and azimuthal quantum number 0, is on the left side of the conventional periodic table and is composed of elements from the first two columns plus one element in the rightmost column, the nonmetals hydrogen and helium and the alkali metals (in group 1) and alkaline earth metals (group 2).

  3. 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.

  4. Elimination reaction - Wikipedia

    en.wikipedia.org/wiki/Elimination_reaction

    The C-H bond is weakened in the rate determining step and therefore a primary deuterium isotope effect much larger than 1 (commonly 2-6) is observed. E2 competes with the S N 2 reaction mechanism if the base can also act as a nucleophile (true for many common bases). Scheme 1: E2 reaction mechanism

  5. SAT Subject Test in Chemistry - Wikipedia

    en.wikipedia.org/wiki/SAT_Subject_Test_in_Chemistry

    The first 23 questions numbered 1-23 were 'classification questions'. The next 15 questions, numbered 101-115, were called 'relationship analysis questions'. The SAT Subject Test in Chemistry was currently the only SAT that incorporates the relationship analysis questions. Relationship Analysis Questions required the student to identify the ...

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