are weak bonds that are not strong enough to hold atoms together to form molecules but are strong enough to form bonds within and around large molecules.

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Hydrogen bonds are weak chemical bonds that occur between a hydrogen atom and an electronegative atom (such as nitrogen, oxygen, or fluorine) in a separate molecule. While these bonds are not strong enough to hold atoms together to form molecules, they are strong enough to form within and around large molecules, such as in the secondary and tertiary structures of proteins. Polar covalent bonds and ionic bonds are stronger and can bond atoms together to form molecules, and covalent bonds are even stronger and involve the sharing of electrons between atoms.

Are Weak Bonds That Are Not Strong Enough to Hold