They typically use rare gases containing molecules because they are non reactive chemical compounds under normal circumstances. The wavelength of laser emission depends on the composition of halogens and the presence of rare gases in the laser medium. The term "excimer" originates from a dimer, wh...
This not only distorts the subject, but makes it less attractive to students who would become good intuitive chemists. Correcting this problem means giving as much attention to those parts of chemistry that cannot easily be understood in rational terms (polymers, intermetallic compounds, colloid and...
What is a negative ion called? What type of ions do halogens form? What kind of ion is formed by metals and transition metals? There are the same amount of protons and electrons in an atom. If this is true, than how are some atoms positively...
Gribble GW (1999) The diversity of naturally occurring organobromine compounds. Chem Soc Rev 28:335–346. https://doi.org/10.1039/A900201D Article CAS Google Scholar Gupta M, Gupta S (2017) An overview of selenium uptake, metabolism, and toxicity in plants. Front Plant Sci 7:2074. https...
it involves the repeated addition of monomers to the polymer chain. the monomers are unsaturated compounds. the monomer and the chain growth polymerization compound is tabulated below. s.no monomers polymers 1 ethylene polythene 2 propylene polypropylene 3 butadiene polybutadiene 4 tetraflouroethylene ...
Functional groups are comprised of the elements in the top right corner of the periodic table (oxygen, nitrogen, sulfur, phosphorus, silicon, and the halogens). Organic compounds are typically molecular solids, meaning they form self-contained molecular units through covalent bonding. In the solid...
Alkali metals are elements of group 1.They are called alkali metals because the hydroxides they form on reaction with water, is highly alkaline in nature. The elements listed below constitute group 1 elements and are collectively considered as alkali metals. ...
so that a carbonized film is formed on the surface of the polymer resin, which insulates the burning surface of the resin from contact with air, extinguishes the fire, and achieves a flame-retardant effect. The polymer resin containing phosphorus and nitrogen compounds generates incombustible gas...
Ozone depletion is caused by chemicals containing the elements chlorine and bromine, which are halogens. They are important components of a class of refrigerants called chlorofluorocarbons (CFCs) that were in heavy use in the mid 20th century. CFCs are inert and able to migrate to the upper atm...
Halogens have seven valence electrons (electrons available for chemical reactions) and are thus extremely active. They are potent oxidizing compounds as they want to get an eighth electron. When they achieve this goal, they become a halide. Examples you might have heard of are Sodium Chloride (...