Covalent bonds are strong and require substantial amounts of energy to break. Covalent bond: a shared pair of electrons. Molecule: two or more atoms covalently bonded together.

Covalent bonding close covalent bondA bond between atoms formed when atoms share electrons to achieve a full outer shell of electrons. leads to the formation of substances with different types of ...

Prior to 2000, many drugs that formed a covalent bond with targets did so non-selectively, which often led to undesired side effects when compared to non-covalent drugs. This led to the belief that ...