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The hydrogen bonds
c) There are covalent bonds, which are strong and don’t readily reform once broken; and noncovalent bonds, which are weaker and more dynamic.
d) The key to self-repair is in the chemical bonding.
a) Two types of bonds exist in materials.
b) For example, the hydrogen bonds that connect water molecules to one another are non-covalent, breaking and reforming constantly to give rise to the fluid properties of water.