Search results
Results From The WOW.Com Content Network
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.
The main group elements are the elements of groups 1, 2, and 13–18 (i.e. the s-block and p-block). [5] The transition elements are the elements of groups 3–12 (i.e. the d-block) – this in particular includes group 12 (although some sources do not include it). [5] The inner transition elements are f-block elements. [2]
Block comments: PowerShell 2.0 supports block comments using <# and #> as delimiters. [ 80 ] New APIs : The new APIs range from handing more control over the PowerShell parser and runtime to the host, to creating and managing collection of Runspaces ( RunspacePools ) as well as the ability to create Restricted Runspaces which only allow a ...
Any organic compound consisting of at least one hydroxyl group attached to a saturated carbon atom. Alcohols have the general formula R–OH. aldehyde A functional group and a class of organic compounds consisting of a carbonyl group attached to a hydrogen atom and any other R-group. Aldehydes have the general formula R–C(H)=O.
The modern meaning of organic compound is any compound that contains a significant amount of carbon—even though many of the organic compounds known today have no connection to any substance found in living organisms. The term carbogenic has been proposed by E. J. Corey as a modern alternative to organic, but this neologism remains relatively ...
An organic compound is any of a large class of chemical compounds whose molecules contain carbon, with the exception of carbides, carbonates, Cyanides and carbon oxides. Organic compounds are studied in organic chemistry ; many of them, such as proteins , fats , and carbohydrates ( sugars ), are also of prime importance in biochemistry .
For reasons of space, [30] [31] the periodic table is commonly presented with the f-block elements cut out and positioned as a distinct part below the main body. [ 32 ] [ 30 ] [ 23 ] This reduces the number of element columns from 32 to 18.
Inorganic polymers can also be named in accordance with inorganic nomenclature, but the seniority of the elements is different from that in organic nomenclature. However, certain inorganic and inorganic-organic polymers, for example those containing metallocene derivatives, are at present best named using organic nomenclature, e.g., the polymer ...