What type of bond occurs between a slightly positive hydrogen atom and a slightly negative atom?

The correct choice describes a hydrogen bond, which is a type of weak attraction that occurs between a slightly positive hydrogen atom and a slightly negative atom, typically oxygen, nitrogen, or fluorine. This interaction is fundamental in many biological and chemical processes, such as the behavior of water and the structure of proteins and nucleic acids.

In more detail, a hydrogen bond forms when the positive charge of a hydrogen atom covalently bonded to a highly electronegative atom is attracted to another electronegative atom nearby. This bond is crucial for the unique properties of water, such as its high surface tension and boiling point, which are essential for life.

Covalent bonds involve the sharing of electrons between atoms, while ionic bonds are formed through the transfer of electrons, resulting in the attraction between opposite charges. Metallic bonds involve the sharing of free electrons among a lattice of metal atoms. Given these definitions, they do not describe the specific interaction that characterizes hydrogen bonding.