(NaturalNews) According to two new studies from University of Connecticut's Human Performance Laboratory, even mild dehydration can have a significant impact on a person's mood, energy levels and mental performance. Test results show no difference between taking a 40 minute walk or sitting at a desk.
Chemical bond. A chemical bond is the physical phenomenon of chemical substances being held together by attraction of atoms to each other through sharing, as well as exchanging, of electrons -or electrostatic forces. In general, strong chemical bonds are found in molecules, crystals or in solid metal and they organize the atoms in ordered structures. Weak chemical bonds are classically explained to be effects of polarity, or the lack of it, of strong bonds.
a type of chemical bond involving the sharing of electrons between atoms in a molecule, esp the sharing of a pair of electrons by two adjacent atoms. covalent bond in Medicine Expand. covalent bond n. A chemical bond formed by the sharing of one or more electrons, especially pairs of electrons, between atoms. covalent bond. A chemical bond formed when electrons are shared between two atoms. Usually each atom contributes one electron to form a pair of electrons that are shared by both atoms. See more at coordinate bond, double bond, polar bond.