Match each bond type to its description.

a) Covalent bonds
b) Ionic bonds
c) Metallic bonds
d) Hydrogen bonds

1.These bonds form when one atom "donates" an electron from its outer shell to another atom.
2.These bonds are not permanent "donations" of electrons from one atom to another, but rather are a system of metal atoms sharing one another's outer electrons.
3.These relatively weak bonds are formed when a hydrogen atom with a slight positive charge is attracted to an atom with a negative charge.
4.These bonds are formed when pairs of atoms share electrons that can shift back and forth between the joined atoms.