News tagged with chemical compounds
Related topics: molecules
A chemical compound is a pure chemical substance consisting of two or more different chemical elements that can be separated into simpler substances by chemical reactions and that have a unique and defined chemical structure. Chemical compounds consist of a fixed ratio of atoms that are held together in a defined spatial arrangement by chemical bonds. Chemical compounds can be compound molecules held together by covalent bonds, salts held together by ionic bonds, metallic compounds held together by metallic bonds, or complexes held together by coordinate covalent bonds. Substances such as pure chemical elements and elemental molecules consisting of multiple atoms of a single element (such as H2, S8, etc.) are not considered chemical compounds.
Elements form compounds to become more stable. They become stable when they have the maximum number of possible electrons in their outermost energy level, which is normally two or eight valence electrons. This is the reason that noble gases do not frequently react: they already possess eight valence electrons (the exception being helium, which requires only two valence electrons to achieve stability).
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Janelle Leuthaeuser is on the cutting edge of biophysics. A molecular genetics and genomics Ph.D. student, she is part of a nationwide effort to create a more efficient generation of protein-based drugs.
Medical research Apr 26, 2013 | 5 / 5 (1) | 0 |
Hydrocarbons, a chemical compound commonly found in household items from cleaning products to gasoline, are among the top 10 causes of pediatric poisoning deaths in the United States. A new study by researchers ...
Pediatrics May 06, 2013 | 4 / 5 (1) | 0