Not exact matches
They always hook up with other
atoms, and the
covalent bond between two nitrogen
atoms is among the strongest of its kind.
Elementary chemistry distinguishes two kinds of strong
bonds between atoms in molecules: the
covalent bond, where
bonding arises from valence electron pairs shared
between neighboring
atoms, and the ionic
bond, where transfer of electrons from one
atom to another leads to Coulombic attraction
between the resulting ions.
Covalent bonds are the strong connections
between atoms that hold molecules together.
But these structures are unstable because electrostatic forces are weak compared with the
covalent bonds formed
between atoms that share electrons.
The polymers
bond to biological tissues via three mechanisms — electrostatic attraction to negatively charged cell surfaces,
covalent bonds between neighboring
atoms, and physical interpenetration — making the adhesive extremely strong.