Final answer:
A hydrogen bond is a weak bond between two molecules that results in an electrostatic attraction. It occurs when a hydrogen atom is attracted to an electronegative atom in a neighboring molecule.
Step-by-step explanation:
A weak bond between two molecules that results in an electrostatic attraction is called a hydrogen bond. Hydrogen bonds occur when a hydrogen atom that is covalently bonded to an electronegative atom is weakly attracted to a second electronegative atom. These bonds are relatively weak compared to covalent bonds, but they play an important role in various biological and chemical processes.
For example, in water molecules, the slightly positively charged hydrogen atom is attracted to the slightly negatively charged oxygen atom in neighboring molecules, forming hydrogen bonds. These hydrogen bonds give water its unique properties, such as its high boiling point, surface tension, and ability to dissolve many substances.
Overall, hydrogen bonds are important in stabilizing the structures of molecules, proteins, and DNA, and they contribute to the properties and behaviors of many substances.