the.com/hydrogen bond
The clingy ex of chemical bonds — not official, but it controls everything.
means A weak attraction between a slightly positive hydrogen atom in one molecule and a slightly negative atom (usually oxygen or nitrogen) in another, strong enough to shape how liquids and biomolecules behave.
from The term comes straight out of chemistry's own naming logic: once scientists in the early 20th century recognized that hydrogen atoms bound to electronegative atoms like oxygen or nitrogen could form a secondary, weaker attraction to another electronegative atom nearby, they simply called it what it does — a 'hydrogen bond.' No myth, no borrowed word — the name is the mechanism, coined as the concept itself solidified through work on water and molecular structure in the 1920s–30s.
- actual strength
- 5-10% as strong as a covalent bond
- water's secret
- gives water its unusually high boiling point
- dna's handshake
- holds the double helix together, lets it unzip
- ice oddity
- makes ice less dense than liquid water, so it floats