What is a hydorgen bond?

Answer 1

Hydrogen BondsIn a compound, there may be atoms with different levels of attraction to electrons. This attraction is called "electronegativity." If one atom in a compound "likes" electrons more (and has a higher electronegativity), the electrons shared between the molecules will spend more time on the atom with a higher electronegativity. Because electrons are negative, the atom that has a stronger attraction will be slightly negative (δ−) while the other atoms will be slightly positive (δ+). In all compounds that have hydrogen bonds, the hydrogen atom(s) is/are the positive atom and the other atom (usually nitrogen, fluorine, or oxygen) is the electronegative negative one.

This slight polarity on the molecule allows it to interact with other molecules of similar charge. The negative atom of one molecule (like nitrogen, fluorine, or oxygen) will bind to the positive hydrogen in another molecule. The bond between the two is a hydrogen bond. It is not a strong bond like a covalent, nor does it actually involve the transfer of electrons, but it does cause two molecules to "stick" together.

The classic (and the most important) case of hydrogen bonding is with water. There are a number of emergent properties of water that are due to the hydrogen bonds, one of which is floating ice. To see an explanation of the hydrogen bonds at work that cause ice to float, see the related question in the "Related Questions" section below.

Answer 2

Hydrogen bonding is a strong dipole-dipole attraction that forms between molecules in which hydrogen is bonded to one of the electronegative elements nitrogen, oxygen and fluorine.

(dipole-dipole bonds are bonds between dipoles - a molecule that has two oppositely charged poles or ends)

Answer 3

A hydrogen bond is an intermolecular force. They are the strongest between the three intermolecular forces. These molecules are very polar because they usually occur between VERY ELECTRONEGATIVE atoms such as nitrogen, oxygen and fluorine. eg's- H20, NH3, Hf

Answer 4

A hydrogen bond is an intermolecular bond between a hydrogen attached to an electronegative atom (N,O, F, etc) on one molecule and an atom with a lone pair of electrons on another atom. These bonds are much weaker than a typically covalent bond. Nevertheless, they can greater affect the properties of a substance and are responsible for water's unique attributes.

Answer 5

A hydrogen bond is the attractive interaction of a hydrogen atom covalently bonded to a very electronegative atom, such as nitrogen, oxygen or fluorine, to another very electronegative atom in another molecule.

The interaction is essentially electrostatic between the small positive charge on the hydrogen atom and the slight negative charge on the N, O or F atom in the other molecule.

Examples are the hydrogen bonding in liquid water, alcohols, ammonia and also in solids, ice, solid hydrogen fluoride.

In larger molecules that have the right shape the hydrogen bonding can occur within the molecule between a hydrogen atom covalently bonded to a very electronegative atom, such as nitrogen, oxygen and a very electronegative atom in another part of the molecule.

Answer 6

A chemical bond formed between hydrogen and oxygen is called hydrogen bond. It is denoted by dotted lines (....).

Answer 7

Hydrogen bonds are weak intermolecular bonds.