Medical research

Natural products with potential efficacy against lethal viruses

Researchers at Scripps Institution of Oceanography and Skaggs School of Pharmacy and Pharmaceutical Sciences at the University of California San Diego have broken down the genomic and life history traits of three classes ...

Medical research

Researchers use soy to improve bone cancer treatment

Researchers in recent years have demonstrated the health benefits of soy, linking its consumption to reduced risk of cardiovascular disease, obesity, cancer and improved bone health.

Medical research

Cashew shell compound appears to mend damaged nerves

In laboratory experiments, a chemical compound found in the shell of the cashew nut promotes the repair of myelin, a team from Vanderbilt University Medical Center reports today in the Proceedings of the National Academy ...

Cardiology

New compound could help patients in shock

When Martin Mangino, Ph.D., and his colleagues discovered a chemical compound while seeking a way to better preserve organs for transplants, Mangino recognized its potential to have other lifesaving uses.

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Chemical compound

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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