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For example, 3-methyl-1-pentene with a rectus assignment is formatted as (R)-3-methyl-1-pentene. [12] An example of a (s) descriptor: (1R,2s,3S)-1,2,3-trichlorocyclopentane. A practical method of determining whether an enantiomer is R or S is by using the right-hand rule: one wraps the molecule with the fingers in the direction 1 → 2 → 3.
A mnemonic is a memory aid used to improve long-term memory and make the process of consolidation easier. Many chemistry aspects, rules, names of compounds, sequences of elements, their reactivity, etc., can be easily and efficiently memorized with the help of mnemonics.
Standards are used in analytical chemistry. Here, a primary standard is typically a reagent which can be weighed easily, and which is so pure that its weight is truly representative of the number of moles of substance contained. Features of a primary standard include: High purity; Stability (low reactivity)
The periodic trends in properties of elements. In chemistry, periodic trends are specific patterns present in the periodic table that illustrate different aspects of certain elements when grouped by period and/or group.
For example, for the compound FeCl 3, the cation, iron, can occur as Fe 2+ and Fe 3+. In order for the compound to have a net charge of zero, the cation must be Fe 3+ so that the three Cl − anions can be balanced (3+ and 3− balance to 0). Thus, this compound is termed iron(III) chloride. Another example could be the compound PbS 2.
Description: A classic general textbook for an undergraduate course in inorganic chemistry Importance: This book is not only a good introduction to the subject, it was very different from earlier texts and "led to a fundamental shift in the way in which inorganic chemistry was studied". [ 16 ]
A 52-week curriculum for a medical school, showing the courses for the different levels. In education, a curriculum (/ k ə ˈ r ɪ k j ʊ l ə m /; pl.: curriculums or curricula / k ə ˈ r ɪ k j ʊ l ə /) is the totality of student experiences that occur in an educational process.
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.
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