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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.
In modern chemistry, the p stands for "the negative decimal logarithm of", and is used in the term pK a for acid dissociation constants, [11] so pH is "the negative decimal logarithm of H + ion concentration", while pOH is "the negative decimal logarithm of OH − ion concentration".
Chemical symbols are the abbreviations used in chemistry, mainly for chemical elements; but also for functional groups, chemical compounds, and other entities. Element symbols for chemical elements, also known as atomic symbols , normally consist of one or two letters from the Latin alphabet and are written with the first letter capitalised.
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 ...
118 chemical elements have been identified and named officially by IUPAC.A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z).
Quantities, Units and Symbols in Physical Chemistry, also known as the Green Book, is a compilation of terms and symbols widely used in the field of physical chemistry. It also includes a table of physical constants , tables listing the properties of elementary particles , chemical elements , and nuclides , and information about conversion ...
Compounds with P-C and P-O-C bonds are often classified as organophosphorus compounds. They are widely used commercially. The PCl 3 serves as a source of P 3+ in routes to organophosphorus(III) compounds. For example, it is the precursor to triphenylphosphine: PCl 3 + 6 Na + 3 C 6 H 5 Cl → P(C 6 H 5) 3 + 6 NaCl
C 52 H 48 MoN 4 P 4: Bis(dinitrogen)bis(1,2-bis(diphenylphosphino)ethane)molybdenum(0) 25145-64-6 C 55 H 74 IN 3 O 21 S 4: calicheamicin: C 58 H 84 N 12 O 26: Mannopeptimycin glycopeptide: C 59 H 80 N 4 O 22 S 4: esperamicin: C 59 H 103 N 3 O 18: Niphimycin: 12676-71-0 C 60: Buckminsterfullerene: 99685-96-8 C 61 H 60 N 14 O 18 S 5: Nocathiacin ...