(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.
By Anne Marie Helmenstine, Ph.D. Hydrogen Bond Definition: A hydrogen bond is a type of attractive (dipole-dipole) interaction between an electronegative atom and a hydrogen atom bonded to another electronegative atom.This bond always involves a hydrogen atom. Hydrogen bonds can occur between molecules or within parts of a single molecule.y Anne Marie Helmenstine, Ph.D. Hydrogen Bond Definition: A hydrogen bond is a type of attractive (dipole-dipole) interaction between an electronegative atom and a hydrogen atom bonded to another electronegative atom.