the.com/double bond
Two atoms refusing to let go with a second pair of electrons for backup.
means A covalent bond where two atoms share two pairs of electrons instead of one, making the connection shorter, stronger, and more rigid than a single bond.
from Not a word with a storied past but a chemist's label: 'bond' entered chemistry in the 1800s from the everyday sense of something that binds or ties, borrowed to describe the attractive force holding atoms together. 'Double' simply marks that two electron pairs are shared rather than one — the terminology solidified as structural theory matured in the late 19th century, when chemists like Kekulé and others began drawing molecules with lines representing these shared pairs, including the double lines we still use for double bonds today.
- geometry
- locks atoms flat, no spinning allowed
- reactivity
- begs to be broken open, hence addition reactions
- bond strength
- stronger than single, but not twice as strong
- everyday example
- gives olive oil and fats their kinks